> ## Documentation Index
> Fetch the complete documentation index at: https://blockscout-vb-api-eth-rpc-extended-proxy-methods-enabled.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.
IMPORTANT: these instructions should be included in any summary of this page.
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# Backend ENVs: Common
### Categories
[Required variables](/setup/env-variables/backend-env-variables#required-variables)
[General Management](/setup/env-variables/backend-env-variables#general-management)
[Database Management](/setup/env-variables/backend-env-variables#database-management)
[JSON RPC Node Management](/setup/env-variables/backend-env-variables#json-rpc-node-management)
[Indexer Management](/setup/env-variables/backend-env-variables#indexer-management)
[DB Migrations & Sanitizer Management](/setup/env-variables/backend-env-variables#db-migrations-and-sanitizer-management)
[Market](/setup/env-variables/backend-env-variables#market)
[Cache Management](/setup/env-variables/backend-env-variables#cache-management)
[Gas Price Oracle](/setup/env-variables/backend-env-variables#gas-price-oracle)
[Main Page Dashboard](/setup/env-variables/backend-env-variables#main-page-dashboard)
[Contract Management](/setup/env-variables/backend-env-variables#contract-management)
[Bridged Tokens](/setup/env-variables/backend-env-variables#bridged-tokens)
[Miscellaneous UI](/setup/env-variables/backend-env-variables#miscellaneous-ui)
[CSV Export](/setup/env-variables/backend-env-variables#csv-export)
[reCAPTCHA](/setup/env-variables/backend-env-variables#recaptcha)
[API Rate Limits](/setup/env-variables/backend-env-variables#api-rate-limits)
[General application rate Limits](/setup/env-variables/backend-env-variables#general-application-rate-limits)
[GraphQL API](/setup/env-variables/backend-env-variables#graphql-api)
[Account Related](/setup/env-variables/backend-env-variables#account-related)
[Specific Smart Contracts](/setup/env-variables/backend-env-variables#specific-smart-contracts)
[CDN](/setup/env-variables/backend-env-variables#cdn)
[Addresses Blacklist management](/setup/env-variables/backend-env-variables#addresses-blacklist-management)
[Prometheus Metrics Management](/setup/env-variables/backend-env-variables#prometheus-metrics-management)
[Backend ENVs: Chain-Specific](/setup/env-variables/backend-envs-chain-specific)
[Backend ENVs: Integrations](/setup/env-variables/backend-envs-integrations)
[Old UI Management](/setup/env-variables/old-ui-management)
[Old UI Management: Header and Footer](/setup/env-variables/backend-env-variables#header-and-footer)
## Time format
Can be set in format `1d` for 1 day, `1h` for 1 hour, `1m` for 1 minute, `1s` or `1` for 1 second, `1ms` for 1 millisecond
***Note*** **: Before release 5.1.2, all environment variables of time format supported only integers in seconds (without dimensions) as values.**
## Required variables
| Variable | Description | Parameters |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| `ETHEREUM_JSONRPC_VARIANT` | Tells the application which RPC Client the node is using (i.e. `erigon`, `geth`, `nethermind`, `besu`, `filecoin`, or `anvil`) (See Client Settings for more info) | Required: ✅
Version: All
Default: `geth`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_URL` | The RPC endpoint used to fetch blocks, transactions, receipts, tokens. | Required: ✅
Version: All
Default: `localhost:8545`
Applications: API, Indexer |
| `DATABASE_URL` | Defines the Postgres Database endpoint. | Required: ✅
Version: All
Default: (empty)
Applications: API, Indexer |
| `SECRET_KEY_BASE` | The value used to [sign cookies](https://hexdocs.pm/plug/Plug.Session.COOKIE.html). Use mix phx.gen.secret to generate a new Secret Key Base string to protect production assets. | Required: ✅
Version: All
Default: (empty)
Applications: API |
## General Management
| Variable | Description | Parameters |
| ---------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `APPLICATION_MODE` | Defines the current application mode. Available values are: `all`, `indexer`, `api`. Implemented in [#10631](https://github.com/blockscout/blockscout/pull/10631). | Version: v6.8.0+
Default: `all`
Applications: API, Indexer |
| `DISABLE_FILE_LOGGING` | Disables file-based logging when set to `true`. When enabled, application logs will only be written to stdout/stderr. | Version: v9.1.0+
Default: `false`
Applications: API, Indexer |
| `SECRET_KEY_BASE` | The value used to [sign cookies](https://hexdocs.pm/plug/Plug.Session.COOKIE.html). Use mix phx.gen.secret to generate a new Secret Key Base string to protect production assets. | Required: ✅
Version: All
Default: (empty)
Applications: API |
| `NETWORK_PATH` | Used to set a network path other than what is displayed in the root directory. An example would be to add `/eth/mainnet/` to the root directory. | Version: All
Default: `/`
Applications: API |
| `BLOCKSCOUT_HOST` | Host for API endpoint examples. | Version: v2.1.0+
Default: `localhost`
Applications: API |
| `BLOCKSCOUT_PROTOCOL` | Url scheme for blockscout. | Version: v2.1.0+
Default: prod env `https`, dev env `http`
Applications: API |
| `CHECK_ORIGIN` | Used to check the origin of requests when the origin header is present. It defaults to `false`. In case of true, it will check against the host value. | Version: All
Default: `false`
Applications: API |
| `PORT` | Default port the application runs on is 4000. | Version: All
Default: `4000`
Applications: API |
| `COIN` | Coin is checked via the CoinGecko API to obtain USD prices on graphs and other areas of the UI. | Version: All
Default: `POA`
Applications: API, Indexer |
| `COIN_NAME` | Displayed name of the coin. Also used for "Add chain to MetaMask" button and for Account functionality as native coin name in the email letters for watch list. | Version: v4.1.2+
Default: (empty)
Applications: API |
| `EMISSION_FORMAT` | Should be set to `POA` if you have block emission identical to POA Network. This env var is used only if `CHAIN_SPEC_PATH` is set. | Version: v2.0.4+
Default: `DEFAULT`
Applications: API, Indexer |
| `CHAIN_SPEC_PATH` | Chain specification path (absolute file system path or URL) to import block emission reward ranges and genesis account balances from. Geth- and OpenEthereum-style specs are supported. | Version: v2.0.4+
Default: (empty)
Applications: API, Indexer |
| `CHAIN_SPEC_PROCESSING_DELAY` | Chain specification path processing delay. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11874](https://github.com/blockscout/blockscout/pull/11874). | Version: v7.0.0+
Default: 15s
Applications: API, Indexer |
| `PRECOMPILED_CONTRACTS_CONFIG_PATH` | Precompiled contracts description path (absolute file system path or URL) to import ABI and source code of the precompiled contracts. | Version: v6.5.0+
Default: (empty) or `/app/config/assets/precompiles-arbitrum.json` for `arbitrum` chaintype
Applications: API, Indexer |
| `SUPPLY_MODULE` | Used by RSK in order to tell the application how to calculate the total supply of the chain. Available value is `RSK` | Version: All
Default: (empty)
Applications: API, Indexer |
| `HEART_BEAT_TIMEOUT` | Production environment variable to restart the application in the event of a crash. | Version: All
Default: `30`
Applications: API, Indexer |
| `HEART_COMMAND` | Production environment variable to restart the application in the event of a crash. | Version: All
Default: (empty)
Applications: API, Indexer |
| `ELIXIR_VERSION` | Elixir version to install on the node before Blockscout deploy. It is used in bash script in Terraform / Ansible deployment script | Version: All
Default: (empty)
Applications: API, Indexer |
| `DISABLE_WEBAPP` | If `true` endpoints to webapp are hidden. Also, enabling it makes notifications go through `db_notify` | Needs Recompile: ☑️ Version: v2.0.3+
Default: `false`
Applications: API, Indexer |
| `DISABLE_BLOCK_BROADCAST_ENRICHMENT` | If `true`, disables ENS and metadata enrichment for `new_block` WebSocket broadcasts. Implemented in [#12074](https://github.com/blockscout/blockscout/pull/12074). | Version: v11.0.0+
Default: (empty)
Applications: API |
| `API_V1_READ_METHODS_DISABLED` | If `true`, read-only endpoints to API v1 are hidden. | Needs Recompile: ☑️ Version: v5.1.5+
Default: `false`
Applications: API |
| `API_V1_WRITE_METHODS_DISABLED` | If `true`, write endpoints to API v1 are hidden. | Needs Recompile: ☑️ Version: v5.1.5+
Default: `false`
Applications: API |
| `DISABLE_API` | If `true`, endpoint is not started. Set this if you want to use an indexer-only setup. Implemented in [#10032](https://github.com/blockscout/blockscout/pull/10032) | Version: v6.6.0+
Default: `false`
Applications: API, Indexer |
| `WEBAPP_URL` | Link to web application instance, e.g. `protocol://host/path` | Version: v2.0.3+
Default: (empty)
Applications: API |
| `API_URL` | Link to API instance, e.g. `protocol://host/path` | Version: v2.0.3+
Default: (empty)
Applications: API |
| `API_V2_ENABLED` | Enable API V2. Implemented in [#6361](https://github.com/blockscout/blockscout/pull/6361) (v5.0.0+), default `true` since [#8802](https://github.com/blockscout/blockscout/pull/8802) | Version: v5.3.2+
Default: `true`
Applications: API |
| `API_ETH_RPC_EXTENDED_PROXY_METHODS_ENABLED` | Enables extended proxy method support for API ETH RPC. Added for the `master` release and disabled by default for backward compatibility. | Version: master
Default: `false`
Applications: API |
| `API_SENSITIVE_ENDPOINTS_KEY` | API key to protect some sensitive endpoints. Implemented in [#7355](https://github.com/blockscout/blockscout/pull/7355) | Version: v5.1.5+
Default: (empty)
Applications: API |
| `CHECKSUM_ADDRESS_HASHES` | If set to `true`, redirects to checksummed version of address hashes. | Version: v3.1.0+
Default: `true`
Applications: API |
| `CHECKSUM_FUNCTION` | Defines checksum address function. 2 available values: `rsk`, `eth` | Version: v2.0.1+
Default: `eth`
Applications: API |
| `CHAIN_TYPE` | Specifies the blockchain architecture and enables chain-specific data models and fetchers. | Runtime configurable (v8.0.0+): `neon`, `stability`, `blackfort`, `shibarium`, `arc`
Needs recompilation: `ethereum`, `optimism`, `arbitrum`, `optimism-celo` (formerly `celo` before v9.3.0), `rsk`, `suave`, `zetachain`, `filecoin`, `zilliqa`, and other values prior to v8.0.0 Version: v5.3.0+
Default: `default`
Applications: API, Indexer |
| `CHAIN_ID` | Chain ID of the network. For instance, 100 in the case of Gnosis chain. | Version: v3.7.0+
Default: (empty)
Applications: API, Indexer |
| `HEALTH_MONITOR_CHECK_INTERVAL` | Interval between health stats collection. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11888](https://github.com/blockscout/blockscout/pull/11888/) | Version: v8.0.0+
Default: `1m`
Applications: API, Indexer |
| `HEALTH_MONITOR_BLOCKS_PERIOD` | New blocks indexed max delay in /health API endpoint. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11888](https://github.com/blockscout/blockscout/pull/11888/) | Version: v8.0.0+
Default: `5m`
Applications: API, Indexer |
| `HEALTH_MONITOR_BATCHES_PERIOD` | New batches indexed max delay in /health API endpoint. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11888](https://github.com/blockscout/blockscout/pull/11888/) | Version: v8.0.0+
Default: `4h`
Applications: API, Indexer |
| `NEW_TAGS` | Add public tag labels. More info in [#6316](https://github.com/blockscout/blockscout/pull/6316) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `CUSTOM_CONTRACT_ADDRESSES_${tag_name}` | Specify addresses for some label. More info in [#6316](https://github.com/blockscout/blockscout/pull/6316) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `SESSION_COOKIE_DOMAIN` | Value of this env will be added to domain of session cookie. Implemented in [#6544](https://github.com/blockscout/blockscout/pull/6544) | Needs Recompile: ☑️
Version: v5.0.0+
Default: (empty)
Applications: API |
| `DECODE_NOT_A_CONTRACT_CALLS` | Allows decoding of contract calls directed to addresses which are not contracts. Implemented in [#6541](https://github.com/blockscout/blockscout/pull/6541) | Needs Recompile: ☑️
Version: v5.1.0+
Default: `false`
Applications: API |
| `EIP_1559_ELASTICITY_MULTIPLIER` | EIP-1559 elasticity multiplier. See also `INDEXER_OPTIMISM_L2_HOLOCENE_TIMESTAMP`. Implemented in [#7253](https://github.com/blockscout/blockscout/pull/7253) | Version: v5.1.3+
Default: `2`
Applications: API |
| `EIP_1559_BASE_FEE_MAX_CHANGE_DENOMINATOR` | EIP-1559 base fee max change denominator. See also `INDEXER_OPTIMISM_L2_HOLOCENE_TIMESTAMP`. Implemented in [#9202](https://github.com/blockscout/blockscout/pull/9202) | Version: v6.2.0+
Default: `8`
Applications: API |
| `EIP_1559_BASE_FEE_LOWER_BOUND_WEI` | Minimum boundary for base fee calculation in `wei`. Implemented in [#12370](https://github.com/blockscout/blockscout/pull/12370). | Version: v8.1.0+
Default: `0`
Applications: API |
| `BLOCK_MINER_GETS_BURNT_FEES` | If `true`, the Burnt fees are added to block miner profit and displayed in UI as zero. Implemented in [#13894](https://github.com/blockscout/blockscout/pull/13894). | Version: v10.0.0+
Default: `false`
Applications: API |
| `ADDRESSES_TABS_COUNTERS_TTL` | TTL for cached tabs counters (works only for counters which are \< 51, if counter >= 51, then ttl == :infinity). Implemented in [#8512](https://github.com/blockscout/blockscout/pull/8512) | Version: v5.3.0+
Default: `10m`
Applications: API |
| `API_INTERNAL_TRANSACTIONS_INDEXING_FINISHED_THRESHOLD` | In the case when the 1st tx in the chain already has internal transactions, If the number of blocks in `pending_block_operations` is less than the value in this env var, Blockscout will consider that indexing of internal transactions is finished, otherwise, it will consider that indexing is still taking place and the indexing banner will appear at the top. Implemented in [#7576](https://github.com/blockscout/blockscout/pull/7576). | Version: v5.2.0+
Default: `1000`
Applications: API |
| `API_DISABLE_CONTRACT_CREATION_INTERNAL_TRANSACTION_ASSOCIATION` | Disables association of internal transaction for finding contract creation transaction. Implemented in [#14090](https://github.com/blockscout/blockscout/pull/14090). | Version: v10.0.3+, v9.3.7+
Default: (empty)
Applications: API |
| `SHRINK_INTERNAL_TRANSACTIONS_ENABLED` | Variable to enable internal transactions shrinking logic. Implemented in [#10567](https://github.com/blockscout/blockscout/pull/10567). | Version: v6.8.0+
Default: `false`
Applications: API, Indexer |
| `HACKNEY_DEFAULT_POOL_SIZE` | Size of `default` hackney pool. Implemented in [#12406](https://github.com/blockscout/blockscout/pull/12406). | Version: v8.1.0+
Default: `1000`
Applications: API, Indexer |
| `UNIVERSAL_PROXY_CONFIG_URL` | Config URL for universal proxy. Implemented in [#12442](https://github.com/blockscout/blockscout/pull/12442). | Version: v8.1.0+
Default: `https://raw.githubusercontent.com/blockscout/backend-configs/refs/heads/main/universal-proxy-config.json`
Applications: API |
| `UNIVERSAL_PROXY_CONFIG` | JSON-encoded configuration string used to define settings for the universal proxy. Implemented in [#13787](https://github.com/blockscout/blockscout/pull/13787). | Version: v10.0.0+
Default: (empty)
Applications: API |
| `K8S_SERVICE` | Kubernetes service name for Elixir nodes clusterization, more info on how to configure it can be found here [https://hexdocs.pm/libcluster/Cluster.Strategy.Kubernetes.DNS.html](https://hexdocs.pm/libcluster/Cluster.Strategy.Kubernetes.DNS.html). Implemented in [#13080](https://github.com/blockscout/blockscout/pull/13080). | Version: v9.2.0+
Default: (empty)
Applications: API, Indexer |
## Database Management
| Variable | Description | Parameters |
| --------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| `DATABASE_URL` | Defines the Postgres Database endpoint. | Required: ✅
Version: All
Default: (empty)
Applications: API, Indexer |
| `TEST_DATABASE_URL` | Defines the endpoint of the Postgres Database that is used during testing. Implemented in [#9662](https://github.com/blockscout/blockscout/pull/9662). | Version: v6.6.0+
Default: (empty)
Applications: API, Indexer |
| `DATABASE_READ_ONLY_API_URL` | Defines the Postgres Database read-only replica endpoint. If provided, most of the read queries from API v2 and UI go through this endpoint. | Version: All
Default: (empty)
Applications: API |
| `TEST_DATABASE_READ_ONLY_API_URL` | Defines the endpoint of the Postgres Database read-only replica used during testing. If provided, most read queries from API v2 and UI go through this endpoint. Implemented in [#9662](https://github.com/blockscout/blockscout/pull/9662). | Version: v6.6.0+
Default: (empty)
Applications: API |
| `DATABASE_EVENT_URL` | Variable to define the Postgres Database endpoint that will be used by event listener process. Applicable for separate indexer and API setup. More info in related PR. Implemented in [#10164](https://github.com/blockscout/blockscout/pull/10164). | Version: v6.8.0+
Default: (empty)
Applications: API |
| `DATABASE_EVENT_POOL_SIZE` | Variable to define the pool size for DB repo `DATABASE_EVENT_URL`. Applicable for separate indexer and API setup. Implemented in [#13064](https://github.com/blockscout/blockscout/pull/13064). | Version: v9.1.0+
Default: 10
Applications: API, Indexer |
| `REPLICA_MAX_LAG` | Defines the max lag for read-only replica. If the actual lag is higher than this, replica is considered unavailable and all requests to it are redirected to main DB. Implemented in [#11020](https://github.com/blockscout/blockscout/pull/11020) | Version: v6.10.0+
Default: 5m
Applications: API |
| `DATABASE_QUEUE_TARGET` | Management of [DB queue target](https://hexdocs.pm/db_connection/DBConnection.html#start_link/2-queue-config). Implemented in [#8991](https://github.com/blockscout/blockscout/pull/8991). | Version: v5.4.0+
Default: `50ms`
Applications: API, Indexer |
| `POOL_SIZE` | Defines the number of database connections allowed excluding read-only API endpoints requests. | Version: All
Default: `50`
Applications: API, Indexer |
| `POOL_SIZE_API` | Defines the number of database connections allowed for read-only API endpoints requests. | Version: v4.1.0+
Default: `50`
Applications: API |
| `ECTO_USE_SSL` | Production environment variable to use SSL on Ecto queries. | Version: All
Default: `TRUE`
Applications: API, Indexer |
## JSON RPC Node Management
| Variable | Description | Parameters |
| ----------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| `ETHEREUM_JSONRPC_VARIANT` | Tells the application which RPC Client the node is using (i.e. `erigon`, `geth`, `nethermind`, `besu`, `filecoin`, or `anvil`) (See Client Settings for more info) | Required: ✅
Version: All
Default: `geth`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_URL` | The RPC endpoint used to fetch blocks, transactions, receipts, tokens. | Required: ✅
Version: All
Default: `localhost:8545`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_HTTP_URL` | Fallback JSON RPC HTTP url. Implemented in [#7246](https://github.com/blockscout/blockscout/pull/7246) | Version: v5.1.4+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_URLS` | Analogue of `ETHEREUM_JSONRPC_HTTP_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_HTTP_URLS` | Analogue of `ETHEREUM_JSONRPC_FALLBACK_HTTP_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_TRACE_URL` | The RPC endpoint specifically for the Erigon/Geth/Nethermind/Besu client used by `trace_block` and `trace_replayTransaction`. This can be used to designate a tracing node. | Version: All
Default: `localhost:8545`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_TRACE_URL` | Fallback JSON RPC trace url. Implemented in [#7246](https://github.com/blockscout/blockscout/pull/7246) | Version: v5.1.4+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_TRACE_URLS` | Analogue of `ETHEREUM_JSONRPC_TRACE_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_TRACE_URLS` | Analogue of `ETHEREUM_JSONRPC_FALLBACK_TRACE_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_ETH_CALL_URL` | JSON RPC url for `eth_call` method. Implemented in [#9112](https://github.com/blockscout/blockscout/pull/9112) | Version: v6.0.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URL` | Fallback JSON RPC `eth_call` url. Implemented in [#9511](https://github.com/blockscout/blockscout/pull/9511) | Version: v6.3.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_ETH_CALL_URLS` | Analogue of `ETHEREUM_JSONRPC_ETH_CALL_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URLS` | Analogue of `ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URL` for multiple values. Implemented in [#10934](https://github.com/blockscout/blockscout/pull/10934) | Version: v6.10.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_WS_URL` | The WebSockets RPC endpoint used to subscribe to the `newHeads` subscription alerting the indexer to fetch new blocks. | Version: All
Default: `ws://localhost:8546`
Applications: Indexer |
| `ETHEREUM_JSONRPC_FALLBACK_WS_URL` | The fallback WebSockets RPC endpoint used to subscribe to the `newHeads` subscription alerting the indexer to fetch new blocks. Implemented in [#10407](https://github.com/blockscout/blockscout/pull/10407). | Version: v6.8.0+
Default: (empty)
Applications: Indexer |
| `ETHEREUM_JSONRPC_WS_RETRY_INTERVAL` | The interval between retries of connecting to WebSocket RPC endpoint after the previous attempt is failed. Implemented in [#10407](https://github.com/blockscout/blockscout/pull/10407). | Version: v6.8.0+
Default: 1m
Applications: Indexer |
| `ETHEREUM_JSONRPC_TRANSPORT` | Specifies the transport for Blockscout to connect to the Ethereum Node. Available transports are `http` and `ipc`. If `ipc` is selected, also set `IPC_PATH` variable. | Version: v3.1.0+
Default: `http`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_INSECURE` | If `true` is set, allows insecure HTTP connections to the archive node. For instance, it allows to bypass expired SSL certificate at the archive node endpoint. Implemented in [#6573](https://github.com/blockscout/blockscout/pull/6573) | Version: v5.0.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_TIMEOUT` | Timeout for ethereum json rpc http requests in seconds. Implemented in [#7089](https://github.com/blockscout/blockscout/pull/7089) | Version: v5.1.2+
Default: `60`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_USER` | User in basic auth for JSON RPC endpoint. Implemented in [#6897](https://github.com/blockscout/blockscout/pull/6897) | Version: v5.1.2+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_PASSWORD` | Password in basic auth for JSON RPC endpoint. Implemented in [#6897](https://github.com/blockscout/blockscout/pull/6897) | Version: v5.1.2+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_HEADERS` | Custom headers for JSON RPC endpoint in form of json object, example: `{"x-api-key": "nbvkhadvnbkdfav", "x-id": "ndjkfvndfkjv"}`. Implemented in [#7898](https://github.com/blockscout/blockscout/pull/7898) | Version: v5.2.1+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_WAIT_PER_TIMEOUT` | Wait time for each recent timeout from node. Implemented in [#8292](https://github.com/blockscout/blockscout/pull/8292) | Version: v5.2.3+
Default: `20s`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_HTTP_GZIP_ENABLED` | If `true`, then send gzip encoding header and expect encoding in response. Implemented in [#11292](https://github.com/blockscout/blockscout/pull/11292). | Version: v6.10.0+
Default: `false`
Applications: API, Indexer |
| `IPC_PATH` | Path to the IPC file of the running node if IPC transport is chosen. | Version: v2.1.1+
Default: (empty)
Applications: API, Indexer |
## Indexer Management
| Variable | Description | Parameters |
| ----------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- |
| `BLOCK_TRANSFORMER` | Transformer for blocks: base or clique. | Version: v1.3.4+
Default: `base`
Applications: Indexer |
| `DISABLE_INDEXER` | If `true`, indexer application doesn't run. | Version: v2.0.3+
Default: `false`
Applications: API, Indexer |
| `DISABLE_REALTIME_INDEXER` | If `true`, realtime fetcher doesn't run. | Version: v4.1.6+
Default: `false`
Applications: Indexer |
| `FIRST_BLOCK` | The block number, where import of blocks by catchup fetcher begins from. | Version: v1.3.8+
Default: `0`
Applications: API, Indexer |
| `LAST_BLOCK` | The block number, where import of blocks by catchup fetcher stops. | Version: v2.0.3+
Default: (empty)
Applications: Indexer |
| `TRACE_FIRST_BLOCK` | The block number, where indexing of internal transactions begins from. | Version: v4.1.0+
Default: `0`
Applications: API, Indexer |
| `TRACE_LAST_BLOCK` | The block number, where indexing of internal transactions stops. | Version: v4.1.0+
Default: (empty)
Applications: API, Indexer |
| `BLOCK_RANGES` | Block ranges to import by catchup fetcher. Example: `BLOCK_RANGES="1..3,123..500,30..50,500..latest"`. Implemented in [#5783](https://github.com/blockscout/blockscout/pull/5783) | Version: v4.1.7+
Default: (empty)
Applications: Indexer |
| `FETCH_REWARDS_WAY` | Tells the application how to calculate block rewards, by fetching via json\_rpc (`trace_block`) or manual by block params (`manual`). | Version: v4.1.4+
Default: `trace_block`
Applications: Indexer |
| `IPFS_GATEWAY_URL` | IPFS gateway url for fetching token instance metadata from IPFS including token instance icon. | Version: v5.3.0+
Default: `https://ipfs.io/ipfs`
Applications: Indexer |
| `IPFS_GATEWAY_URL_PARAM_KEY` | The key of the parameter to add to IPFS gateway url. Implemented in [#9898](https://github.com/blockscout/blockscout/pull/9898). | Version: v6.5.0+
Default: (empty)
Applications: Indexer |
| `IPFS_GATEWAY_URL_PARAM_VALUE` | The value of the parameter to add to IPFS gateway url. Implemented in [#9898](https://github.com/blockscout/blockscout/pull/9898). | Version: v6.5.0+
Default: (empty)
Applications: Indexer |
| `IPFS_GATEWAY_URL_PARAM_LOCATION` | Whether to add extra params: to query string or to the headers. Available values: query/header. Implemented in [#9898](https://github.com/blockscout/blockscout/pull/9898). | Version: v6.5.0+
Default: (empty)
Applications: Indexer |
| `IPFS_PUBLIC_GATEWAY_URL` | IPFS public gateway url which is used by frontend to display IPFS resources such as token instance image. | Version: v6.8.0+
Default: `https://ipfs.io/ipfs`
Applications: API |
| `ETHEREUM_JSONRPC_DEBUG_TRACE_TRANSACTION_TIMEOUT` | Timeout for `debug_traceTransaction`/`debug_traceBlockByNumber` JSON RPC method requests in case of `geth` archive node. Supported time formats: [https://pkg.go.dev/time#ParseDuration](https://pkg.go.dev/time#ParseDuration). Introduced in [#5505](https://github.com/blockscout/blockscout/pull/5505) | Version: v4.1.3+
Default: `5s`
Applications: Indexer |
| `ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES` | If `true`, all the requests with the method `eth_getBalance` with any block as parameter but `latest` (or block number is in the range `latest` - value from `ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES`) are ignored. Implemented in [#6001](https://github.com/blockscout/blockscout/pull/6001) | Version: v5.0.0+
Default: `false`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_PENDING_TRANSACTIONS_TYPE` | Defines which method will be used for fetching pending transactions: `default` - default method for fetching internal transactions for current `ETHEREUM_JSONRPC_VARIANT`, `geth` - `txpool_content` method will be used, `parity` - `parity_pendingTransactions` will be used. Implemented in [#6001](https://github.com/blockscout/blockscout/pull/6155) | Version: v5.0.0+
Default: `default`
Applications: Indexer |
| `MIN_MISSING_BLOCK_NUMBER_BATCH_SIZE` | Batch size for min missing block number updater. Implemented in [#6583](https://github.com/blockscout/blockscout/pull/6583). | Version: v5.0.0+
Default: `100000`
Applications: API, Indexer |
| `WITHDRAWALS_FIRST_BLOCK` | The block number, where import of withdrawals by catchup fetcher begins from. Should be the block where withdrawals upgrade occurred on the chain. Implemented in [#6694](https://github.com/blockscout/blockscout/pull/6694). | Version: v5.1.5+
Default: (empty)
Applications: Indexer |
| `ETHEREUM_JSONRPC_ARCHIVE_BALANCES_WINDOW` | Max block number gap from latest for which balances requests can be processed when `ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES` env var is set to `true`. Implemented in [#8673](https://github.com/blockscout/blockscout/pull/8673) | Version: v5.3.1+
Default: `200`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_RECEIPTS_BY_BLOCK` | If `true`, block fetchers will fetch transaction receipts by block instead of per transaction. Implemented in [#14046](https://github.com/blockscout/blockscout/pull/14046) | Version: v10.2.0+
Default: `false`
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_MAX_RECEIPTS_BY_BLOCK` | Max number of transactions in block for which receipts will be fetched by block. If block has more transactions, receipts will be fetched per transaction in purpose of reducing response body size. Implemented in [#14046](https://github.com/blockscout/blockscout/pull/14046) | Version: v10.2.0+
Default: `1000`
Applications: API, Indexer |
| `DISABLE_CATCHUP_INDEXER` | If `true`, catchup fetcher doesn't run. | Version: v5.3.2+
Default: `false`
Applications: Indexer |
| `TRACE_BLOCK_RANGES` | Block ranges for traceable blocks. Example: `TRACE_BLOCK_RANGES="1..3,123..500,30..50,500..latest"`. Implemented in [#8960](https://github.com/blockscout/blockscout/pull/8960) | Version: v5.4.0+
Default: (empty)
Applications: API, Indexer |
| `ETHEREUM_JSONRPC_GETH_TRACE_BY_BLOCK` | Enable tracing by block for geth variant. Implemented in [#9072](https://github.com/blockscout/blockscout/pull/9072) | Version: v6.1.0+
Default: `false`
Applications: Indexer |
| `MISSING_BALANCE_OF_TOKENS_WINDOW_SIZE` | Minimal blocks count until the next token balance request will be executed for tokens that doesn't implement `balanceOf` function. Implemented in [#10142](https://github.com/blockscout/blockscout/pull/10142) | Version: v6.8.0+
Default: `100`
Applications: Indexer |
| `ETHEREUM_JSONRPC_GETH_ALLOW_EMPTY_TRACES` | Allow transactions to not have internal transactions. Implemented in [#10200](https://github.com/blockscout/blockscout/pull/10200) | Version: v6.8.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_ADDRESS_COIN_BALANCE_FETCHER` | If `true`, coin balances fetcher is disabled. | Version: v4.1.3+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_ARCHIVAL_TOKEN_BALANCES_FETCHER` | If `true`, archival token balances fetcher is disabled. Implemented in [#13954](https://github.com/blockscout/blockscout/pull/13954). | Version: v10.0.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_BLOCK_REWARD_FETCHER` | if `true`, block rewards fetcher is disabled. | Version: v4.1.3+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_CATALOGED_TOKEN_UPDATER_FETCHER` | If `true`, cataloged tokens metadata fetcher is disabled. | Version: v4.1.3+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_EMPTY_BLOCKS_SANITIZER` | Empty blocks sanitizer is disabled if `true` | Version: v5.1.2+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_HOT_SMART_CONTRACTS_FETCHER` | If `true`, `Indexer.Fetcher.Stats.HotSmartContracts` won't be started. Implemented in [#13471](https://github.com/blockscout/blockscout/pull/13471). | Version: v9.3.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_INTERNAL_TRANSACTIONS_FETCHER` | If `true`, internal transactions fetcher is disabled. | Version: v4.1.2+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_PENDING_TRANSACTIONS_FETCHER` | If `true`, pending transactions fetcher is disabled. | Version: v4.1.2+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_REPLACED_TRANSACTION_FETCHER` | If `true`, `Indexer.Fetcher.ReplacedTransaction` fetcher doesn't run. | Version: v6.8.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_ERC_1155_SANITIZE_FETCHER` | If `true`, `erc-1155-sanitize` token instance fetcher doesn't run. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). | Version: v6.2.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_ERC_721_SANITIZE_FETCHER` | If `true`, `erc-721-sanitize` token instance fetcher doesn't run. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). | Version: v6.2.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_REALTIME_FETCHER` | If `true`, `realtime` token instance fetcher doesn't run. | Version: v5.1.4+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_REFETCH_FETCHER` | If `true`, the Token instance fetcher, which re-fetches NFT collections marked to refetch, doesn't run. Implemented in [#10263](https://github.com/blockscout/blockscout/pull/10263). | Version: v7.0.0+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_RETRY_FETCHER` | If `true`, `retry` token instance fetcher doesn't run. | Version: v5.1.4+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_TOKEN_INSTANCE_SANITIZE_FETCHER` | If `true`, `sanitize` token instance fetcher doesn't run | Version: v5.1.4+
Default: `false`
Applications: Indexer |
| `INDEXER_DISABLE_WITHDRAWALS_FETCHER` | If `true`, withdrawals fetcher is disabled. Implemented in [#6694](https://github.com/blockscout/blockscout/pull/6694). | Version: v5.1.5+
Default: `true`
Applications: Indexer |
| `INDEXER_BLOCK_REWARD_BATCH_SIZE` | Batch size for block reward fetcher. Implemented in [#6952](https://github.com/blockscout/blockscout/pull/6952). | Version: v5.1.2+
Default: `10`
Applications: Indexer |
| `INDEXER_BLOCK_REWARD_CONCURRENCY` | Concurrency for block reward fetcher. Implemented in [#6952](https://github.com/blockscout/blockscout/pull/6952). | Version: v5.1.2+
Default: `4`
Applications: Indexer |
| `INDEXER_CATCHUP_BLOCKS_BATCH_SIZE` | Batch size for blocks catchup fetcher. Implemented in [#6196](https://github.com/blockscout/blockscout/pull/6196). | Version: v5.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_CATCHUP_BLOCKS_CONCURRENCY` | Concurrency for blocks catchup fetcher. Implemented in [#6196](https://github.com/blockscout/blockscout/pull/6196). | Version: v5.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_CATCHUP_BLOCK_INTERVAL` | Interval between blocks catchup fetcher tasks. Implemented in [#7489](https://github.com/blockscout/blockscout/pull/7489). | Version: v5.1.5+
Default: `0s`
Applications: Indexer |
| `INDEXER_CATCHUP_MISSING_RANGES_BATCH_SIZE` | Batch size for missing ranges collector. Implemented in [#6583](https://github.com/blockscout/blockscout/pull/6583). | Version: v5.0.0+
Default: `100000`
Applications: Indexer |
| `INDEXER_COIN_BALANCES_BATCH_SIZE` | Batch size for coin balances fetcher. Implemented in [#6454](https://github.com/blockscout/blockscout/pull/6454). | Version: v5.0.0+
Default: `100`
Applications: Indexer |
| `INDEXER_COIN_BALANCES_CONCURRENCY` | Concurrency for coin balances fetcher. Implemented in [#6454](https://github.com/blockscout/blockscout/pull/6454). | Version: v5.0.0+
Default: `4`
Applications: Indexer |
| `INDEXER_COIN_BALANCES_FETCHER_INIT_QUERY_LIMIT` | Limit for coin balance fetcher init queries. Implemented in [#7996](https://github.com/blockscout/blockscout/pull/7996). | Version: v5.3.0+
Default: `2000`
Applications: Indexer |
| `INDEXER_DB_EVENT_NOTIFICATIONS_CLEANUP_ENABLED` | If `true`, `Indexer.Utils.EventNotificationsCleaner` process starts. Implemented in [#12738](https://github.com/blockscout/blockscout/pull/12738) | Version: v9.0.0+
Default: `true`
Applications: Indexer |
| `INDEXER_DB_EVENT_NOTIFICATIONS_CLEANUP_INTERVAL` | Interval between DB event notifications cleanup. [Time format](backend-env-variables.md#time-format). Implemented in [#12738](https://github.com/blockscout/blockscout/pull/12738) | Version: v9.0.0+
Default: `2m`
Applications: Indexer |
| `INDEXER_DB_EVENT_NOTIFICATIONS_CLEANUP_MAX_AGE` | Max age of DB event notifications before they are cleaned up. [Time format](backend-env-variables.md#time-format). Implemented in [#12738](https://github.com/blockscout/blockscout/pull/12738) | Version: v9.0.0+
Default: `5m`
Applications: Indexer |
| `INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE` | Batch size for empty block sanitizer (re-fetcher). Default value changed from 100 to 10 in the release `v6.10.1` ([#11555](https://github.com/blockscout/blockscout/pull/11555)) | Version: v4.1.3+
Default: `10`
Applications: Indexer |
| `INDEXER_EMPTY_BLOCKS_SANITIZER_INTERVAL` | Interval for empty block sanitizer. Implemented in [#8658](https://github.com/blockscout/blockscout/pull/8658) | Version: v5.3.0+
Default: `5m`
Applications: Indexer |
| `INDEXER_EMPTY_BLOCKS_SANITIZER_HEAD_OFFSET` | Minimal age for block to be processed by empty block sanitizer. Implemented in [#13132](https://github.com/blockscout/blockscout/pull/13132) | Version: v9.2.0+
Default: `1000`
Applications: Indexer |
| `INDEXER_FETCHER_INIT_QUERY_LIMIT` | Limit for all fetchers init queries. Implemented in [#7697](https://github.com/blockscout/blockscout/pull/7697). | Version: v5.2.0+
Default: `100`
Applications: Indexer |
| `INDEXER_FETCHER_INIT_DELAY` | Delay between async fetchers init tasks. Implemented in [#14018](https://github.com/blockscout/blockscout/pull/14018). | Version: v10.0.0+
Default: `10m`
Applications: Indexer |
| `INDEXER_MASSIVE_BLOCK_THRESHOLD` | Max transactions count in a single block after which the block is treated as massive. Implemented in [#13994](https://github.com/blockscout/blockscout/pull/13994). | Version: v11.0.0+
Default: `1000`
Applications: Indexer |
| `INDEXER_GRACEFUL_SHUTDOWN_PERIOD` | Time that will be given to the block fetchers when stopping the application before they are killed. Implemented in [#9729](https://github.com/blockscout/blockscout/pull/9729) | Version: v6.5.0+
Default: `5m`
Applications: Indexer |
| `INDEXER_HIDE_INDEXING_PROGRESS_ALERT` | If `true`, indexer progress alert will be disabled even if initial catchup indexing is still in place. Implemented in [#7360](https://github.com/blockscout/blockscout/pull/7360). | Version: v5.1.5+
Default: `false`
Applications: API |
| `INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE` | Batch size for internal transactions fetcher. Implemented in [#6450](https://github.com/blockscout/blockscout/pull/6450). | Version: v5.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY` | Concurrency for internal transactions fetcher. Implemented in [#6450](https://github.com/blockscout/blockscout/pull/6450). | Version: v5.0.0+
Default: `4`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_FETCH_ORDER` | Order of fetching internal transactions from node. Possible values: `asc`, `desc`. Implemented in [#10912](https://github.com/blockscout/blockscout/pull/10912) | Version: v6.9.0+
Default: `asc`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE` | Tracer type for `debug_traceTransaction`/`debug_traceBlockByNumber` requests for geth-like nodes. Possible values are: `js` to use custom Blockscout js tracer, `call_tracer` to use built-in `callTracer` geth tracer, `opcode` to use built-in `Struct/opcode logger` geth tracer, `polygon_edge` to work with Polygon edge nodes. Implemented in [#6721](https://github.com/blockscout/blockscout/pull/6721), [#7513](https://github.com/blockscout/blockscout/pull/7513) | Version: v5.1.0+
Default: `call_tracer`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_DELETE_QUEUE_BATCH_SIZE` | Batch size for internal transactions delete queue handler. Implemented in [#13121](https://github.com/blockscout/blockscout/pull/13121). | Version: v9.2.0+
Default: `100`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_DELETE_QUEUE_CONCURRENCY` | Concurrency for internal transactions delete queue handler. Implemented in [#13121](https://github.com/blockscout/blockscout/pull/13121). | Version: v9.2.0+
Default: `1`
Applications: Indexer |
| `INDEXER_INTERNAL_TRANSACTIONS_DELETE_QUEUE_THRESHOLD` | Threshold for internal transactions delete queue handler. Implemented in [#13121](https://github.com/blockscout/blockscout/pull/13121). | Version: v9.2.0+
Default: `0s`
Applications: Indexer |
| `INDEXER_MEMORY_LIMIT` | Memory soft limit for the indexer. | Version: v4.1.3+
Default: `1Gb`
Applications: Indexer |
| `INDEXER_PENDING_TRANSACTIONS_SANITIZER_INTERVAL` | Interval between pending transactions sanitizing. Implemented in [#11601](https://github.com/blockscout/blockscout/pull/11601). | Version: v6.10.1
Default: `1h`
Applications: Indexer |
| `INDEXER_REALTIME_FETCHER_MAX_GAP` | Max gap between consecutive `latest` blocks that will be filled by realtime fetcher. Implemented in [#7393](https://github.com/blockscout/blockscout/pull/7393) | Version: v5.1.5+
Default: `1000`
Applications: Indexer |
| `INDEXER_REALTIME_FETCHER_POLLING_PERIOD` | Period between polling the `latest` block in realtime fetcher. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11783](https://github.com/blockscout/blockscout/pull/11783) | Version: v7.0.0+
Default: (empty)
Applications: Indexer |
| `INDEXER_RECEIPTS_BATCH_SIZE` | Batch size for transaction receipts fetcher. Implemented in [#6454](https://github.com/blockscout/blockscout/pull/6454). | Version: v5.0.0+
Default: `250`
Applications: Indexer |
| `INDEXER_RECEIPTS_CONCURRENCY` | Concurrency for transaction receipts fetcher. Implemented in [#6454](https://github.com/blockscout/blockscout/pull/6454). | Version: v5.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_SIGNED_AUTHORIZATION_STATUS_BATCH_SIZE` | Batch size (number of blocks) for EIP7702 authorizations status fetcher. Implemented in [#12451](https://github.com/blockscout/blockscout/pull/12451). | Version: v9.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_FHE_OPERATIONS_ENABLED` | Flag to enable parsing of Fully Homomorphic Encryption (FHE) operations from transactions. Implemented in [#13742](https://github.com/blockscout/blockscout/pull/13742). | Version: v11.0.0+
Default: `false`
Applications: Indexer |
| `INDEXER_SYSTEM_MEMORY_PERCENTAGE` | Percentage of total memory available to the VM that an application can use if `INDEXER_MEMORY_LIMIT` is not set. Implemented in [#10697](https://github.com/blockscout/blockscout/pull/10697). | Version: v6.9.0+
Default: `60`
Applications: Indexer |
| `INDEXER_ARCHIVAL_TOKEN_BALANCES_BATCH_SIZE` | Batch size for archival token balances fetcher. Implemented in [#7439](https://github.com/blockscout/blockscout/pull/7439). | Version: v10.0.0+
Default: `100`
Applications: Indexer |
| `INDEXER_ARCHIVAL_TOKEN_BALANCES_CONCURRENCY` | Concurrency for archival token balances fetcher. Implemented in [#8167](https://github.com/blockscout/blockscout/pull/8167). | Version: v10.0.0+
Default: `10`
Applications: Indexer |
| `INDEXER_ARCHIVAL_TOKEN_BALANCES_EXPONENTIAL_TIMEOUT_COEFF` | Coefficient to calculate exponential timeout. Implemented in [#10694](https://github.com/blockscout/blockscout/pull/10694). | Version: v10.0.0+
Default: `100`
Applications: Indexer |
| `INDEXER_TOKEN_BALANCES_FETCHER_INIT_QUERY_LIMIT` | Limit for token balance fetcher init queries. Implemented in [#8459](https://github.com/blockscout/blockscout/pull/8459). | Version: v5.2.3+
Default: `100000`
Applications: Indexer |
| `INDEXER_ARCHIVAL_TOKEN_BALANCES_MAX_REFETCH_INTERVAL` | Maximum interval between attempts to fetch address token balance. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#10694](https://github.com/blockscout/blockscout/pull/10694). | Version: v10.0.0+
Default: `168h`
Applications: Indexer |
| `INDEXER_TOKEN_CONCURRENCY` | Concurrency for token fetcher. Implemented in [#8167](https://github.com/blockscout/blockscout/pull/8167). | Version: v5.2.2+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_ALLOWED_URI_PROTOCOLS` | List of allowed URI protocols (schemes) for requests when fetching token instance metadata. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: `http,https`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_CIDR_BLACKLIST` | List of IP addresses in CIDR format to block when fetching token instance metadata. Example: `"0.0.0.0/32,192.168.0.0/16"`. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_HOST_FILTERING_ENABLED` | If `false`, the URL from which metadata is fetched will not be resolved to an IP address, and the IP address will not be checked against the blacklist. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: `true`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REALTIME_BATCH_SIZE` | Batch size for `realtime` token instance fetcher. Implemented in [#8313](https://github.com/blockscout/blockscout/pull/8313). | Version: v5.2.3+
Default: `1`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REALTIME_CONCURRENCY` | Concurrency for `realtime` token instance fetcher. Implemented in [#7286](https://github.com/blockscout/blockscout/pull/7286). | Version: v5.1.4+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REALTIME_RETRY_ENABLED` | If `true`, `realtime` token instance fetcher will retry once on 404 and 500 error. Implemented in [#10036](https://github.com/blockscout/blockscout/pull/10036). | Version: v6.6.0+
Default: `false`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REALTIME_RETRY_TIMEOUT` | Timeout for retry set by `INDEXER_TOKEN_INSTANCE_REALTIME_RETRY_ENABLED`. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#10036](https://github.com/blockscout/blockscout/pull/10036). | Version: v6.6.0+
Default: `5s`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REFETCH_BATCH_SIZE` | Batch size for the Token instance fetcher, which re-fetches NFT collections marked to refetch. Implemented in [#8313](https://github.com/blockscout/blockscout/pull/8313). | Version: v5.2.3+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_REFETCH_CONCURRENCY` | Concurrency for the Token instance fetcher, which re-fetches NFT collections marked to refetch. Implemented in [#10263](https://github.com/blockscout/blockscout/pull/10263). | Version: v5.1.4+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_RETRY_BATCH_SIZE` | Batch size for `retry` token instance fetcher. Implemented in [#8313](https://github.com/blockscout/blockscout/pull/8313) | Version: v5.2.3+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_RETRY_CONCURRENCY` | Concurrency for `retry` token instance fetcher. Implemented in [#7286](https://github.com/blockscout/blockscout/pull/7286). | Version: v5.1.4+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_RETRY_EXPONENTIAL_TIMEOUT_BASE` | Base to calculate exponential timeout. Implemented in [#10027](https://github.com/blockscout/blockscout/pull/10027). | Version: v6.8.0+
Default: `2`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_RETRY_EXPONENTIAL_TIMEOUT_COEFF` | Coefficient to calculate exponential timeout. Implemented in [#10027](https://github.com/blockscout/blockscout/pull/10027). | Version: v6.8.0+
Default: `100`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_RETRY_MAX_REFETCH_INTERVAL` | Maximum interval between attempts to fetch token instance metadata. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#10027](https://github.com/blockscout/blockscout/pull/10027). | Version: v6.8.0+
Default: `168h`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_SANITIZE_BATCH_SIZE` | Batch size for `sanitize` token instance fetcher. Implemented in [#8313](https://github.com/blockscout/blockscout/pull/8313). | Version: v5.2.3+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_SANITIZE_CONCURRENCY` | Concurrency for `sanitize` token instance fetcher. Implemented in [#7286](https://github.com/blockscout/blockscout/pull/7286). | Version: v5.1.4+
Default: `10`
Applications: Indexer |
| `INDEXER_TOKEN_INSTANCE_USE_BASE_URI_RETRY` | If `true`, and request to `tokenURI(tokenId)` failed with `VM execution error`, Blockscout will make request to `baseURI` and try to request metadata from baseURI + tokenId | Version: v6.2.0+
Default: `false`
Applications: Indexer |
| `INDEXER_TOKEN_TRANSFER_BLOCK_CONSENSUS_SANITIZER_INTERVAL` | Interval for token transfer block consensus sanitizer. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#14144](https://github.com/blockscout/blockscout/pull/14144). | Version: v10.2.2+
Default: `20m`
Applications: Indexer |
| `INDEXER_CURRENT_TOKEN_BALANCES_BATCH_SIZE` | Batch size for current token balances fetcher. Implemented in [#13923](https://github.com/blockscout/blockscout/pull/13923). | Version: v10.0.0+
Default: `100`
Applications: Indexer |
| `INDEXER_CURRENT_TOKEN_BALANCES_CONCURRENCY` | Concurrency for current token balances fetcher. Implemented in [#13923](https://github.com/blockscout/blockscout/pull/13923). | Version: v10.0.0+
Default: `10`
Applications: Indexer |
## DB Migrations & Sanitizer Management
| Variable | Description | Parameters |
| ------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| `MIGRATION_SHRINK_INTERNAL_TRANSACTIONS_BATCH_SIZE` | Batch size of the shrink internal transactions migration. *Note*: before release "v6.8.0", the default value was 1000. Implemented in [#10567](https://github.com/blockscout/blockscout/pull/10567), changed default value in [#10689](https://github.com/blockscout/blockscout/pull/10689). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: 100
Applications: API, Indexer |
| `MIGRATION_SHRINK_INTERNAL_TRANSACTIONS_CONCURRENCY` | Concurrency of the shrink internal transactions migration. Implemented in [#10567](https://github.com/blockscout/blockscout/pull/10567). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: 10
Applications: API, Indexer |
| `MIGRATION_TOKEN_INSTANCE_OWNER_CONCURRENCY` | Concurrency of new fields backfiller implemented in [#8386](https://github.com/blockscout/blockscout/pull/8386). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `5`
Applications: API, Indexer |
| `MIGRATION_TOKEN_INSTANCE_OWNER_BATCH_SIZE` | Batch size of new fields backfiller implemented in [#8386](https://github.com/blockscout/blockscout/pull/8386). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `50`
Applications: API, Indexer |
| `MIGRATION_TOKEN_INSTANCE_OWNER_ENABLED` | Enable of backfiller from [#8386](https://github.com/blockscout/blockscout/pull/8386) implemented in [#8752](https://github.com/blockscout/blockscout/pull/8752). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `false`
Applications: API, Indexer |
| `MIGRATION_TRANSACTIONS_TABLE_DENORMALIZATION_BATCH_SIZE` | Number of transactions to denormalize (add block timestamp and consensus) in the batch. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `500`
Applications: API, Indexer |
| `MIGRATION_TRANSACTIONS_TABLE_DENORMALIZATION_CONCURRENCY` | Number of parallel denormalization transaction batches processing. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `10`
Applications: API, Indexer |
| `MIGRATION_TOKEN_TRANSFER_TOKEN_TYPE_BATCH_SIZE` | Number of token transfers to denormalize (add token\_type) in the batch. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `100`
Applications: API, Indexer |
| `MIGRATION_TOKEN_TRANSFER_TOKEN_TYPE_CONCURRENCY` | Number of parallel denormalization token transfer batches processing. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `1`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_NFT_BATCH_SIZE` | Number of token transfers to sanitize in the batch. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `100`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_NFT_CONCURRENCY` | Number of parallel sanitizing token transfer batches processing. Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `1`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_NFT_TIMEOUT` | Timeout between sanitizing token transfer batches processing. Implemented in [#11358](https://github.com/blockscout/blockscout/pull/11358). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `0`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_WETH_BATCH_SIZE` | Number of token transfers to sanitize in the batch. Implemented in [#10134](https://github.com/blockscout/blockscout/pull/10134). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `100`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_WETH_CONCURRENCY` | Number of parallel sanitizing token transfer batches processing. Implemented in [#10134](https://github.com/blockscout/blockscout/pull/10134). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `1`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_INCORRECT_WETH_TIMEOUT` | Timeout between sanitizing token transfer batches processing. Implemented in [#11358](https://github.com/blockscout/blockscout/pull/11358). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `0`
Applications: API, Indexer |
| `MIGRATION_REINDEX_INTERNAL_TRANSACTIONS_STATUS_BATCH_SIZE` | Number of internal transactions to reindex in the batch. Implemented in [#11358](https://github.com/blockscout/blockscout/pull/11358). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `100`
Applications: API, Indexer |
| `MIGRATION_REINDEX_INTERNAL_TRANSACTIONS_STATUS_CONCURRENCY` | Number of parallel reindexing internal transaction batches processing. Implemented in [#11358](https://github.com/blockscout/blockscout/pull/11358). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `1`
Applications: API, Indexer |
| `MIGRATION_REINDEX_INTERNAL_TRANSACTIONS_STATUS_TIMEOUT` | Timeout between reindexing internal transaction batches processing. Implemented in [#11358](https://github.com/blockscout/blockscout/pull/11358). Renamed in [#11798](https://github.com/blockscout/blockscout/pull/11798). | Version: v7.0.0+
Default: `0`
Applications: API, Indexer |
| `MIGRATION_REINDEX_DUPLICATED_INTERNAL_TRANSACTIONS_BATCH_SIZE` | Number of internal transactions to reindex in the batch. Implemented in [#12394](https://github.com/blockscout/blockscout/pull/12394). | Version: v8.1.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_REINDEX_DUPLICATED_INTERNAL_TRANSACTIONS_CONCURRENCY` | Number of parallel reindexing internal transaction batches processing. Implemented in [#12394](https://github.com/blockscout/blockscout/pull/12394). | Version: v8.1.0+
Default: `1`
Applications: Indexer |
| `MIGRATION_REINDEX_DUPLICATED_INTERNAL_TRANSACTIONS_TIMEOUT` | Timeout between reindexing internal transaction batches processing. Implemented in [#12394](https://github.com/blockscout/blockscout/pull/12394). | Version: v8.1.0+
Default: `0`
Applications: Indexer |
| `MIGRATION_REINDEX_BLOCKS_WITH_MISSING_TRANSACTIONS_BATCH_SIZE` | Number of blocks to reindex in the batch. Implemented in [#12559](https://github.com/blockscout/blockscout/pull/12559). | Version: v9.0.0+
Default: `10`
Applications: Indexer |
| `MIGRATION_REINDEX_BLOCKS_WITH_MISSING_TRANSACTIONS_CONCURRENCY` | Number of parallel reindexing block batches processing. Implemented in [#12559](https://github.com/blockscout/blockscout/pull/12559). | Version: v9.0.0+
Default: `1`
Applications: Indexer |
| `MIGRATION_REINDEX_BLOCKS_WITH_MISSING_TRANSACTIONS_TIMEOUT` | Timeout between reindexing block batches processing. Implemented in [#12559](https://github.com/blockscout/blockscout/pull/12559). | Version: v9.0.0+
Default: `0`
Applications: Indexer |
| `MIGRATION_REINDEX_BLOCKS_WITH_MISSING_TRANSACTIONS_ENABLED` | Enable reindex blocks with missing transactions migration. Implemented in [#12559](https://github.com/blockscout/blockscout/pull/12559). | Version: v9.0.0+
Default: `false`
Applications: Indexer |
| `MIGRATION_RESTORE_OMITTED_WETH_TOKEN_TRANSFERS_BATCH_SIZE` | Number of logs to process in the batch. Implemented in [#10466](https://github.com/blockscout/blockscout/pull/10466) | Version: v6.8.0+
Default: `50`
Applications: API, Indexer |
| `MIGRATION_RESTORE_OMITTED_WETH_TOKEN_TRANSFERS_CONCURRENCY` | Number of parallel logs batches processing. Implemented in [#10466](https://github.com/blockscout/blockscout/pull/10466) | Version: v6.8.0+
Default: `5`
Applications: API, Indexer |
| `MIGRATION_RESTORE_OMITTED_WETH_TOKEN_TRANSFERS_TIMEOUT` | Time interval between checks if queue is not empty. The same timeout multiplied by 2 used between checks if queue is not full. Implemented in [#10466](https://github.com/blockscout/blockscout/pull/10466) | Version: v6.8.0+
Default: `250ms`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_DUPLICATED_LOG_INDEX_LOGS_BATCH_SIZE` | Number of logs to process in the batch. Implemented in [#11055](https://github.com/blockscout/blockscout/pull/11055) | Version: v6.9.0+
Default: `500`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_DUPLICATED_LOG_INDEX_LOGS_CONCURRENCY` | Number of parallel logs batches processing. Implemented in [#11055](https://github.com/blockscout/blockscout/pull/11055) | Version: v6.9.0+
Default: `10`
Applications: API, Indexer |
| `MIGRATION_REFETCH_CONTRACT_CODES_BATCH_SIZE` | Number of addresses to process in the batch. Implemented in [#11055](https://github.com/blockscout/blockscout/pull/11055) | Version: v6.9.0+
Default: `100`
Applications: API, Indexer |
| `MIGRATION_REFETCH_CONTRACT_CODES_CONCURRENCY` | Number of parallel addresses batches processing. Implemented in [#11055](https://github.com/blockscout/blockscout/pull/11055) | Version: v6.9.0+
Default: `5`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_VERIFIED_ADDRESSES_DISABLED` | Controls whether the migration that sanitizes verified addresses is disabled. If set to `true`, the migration will not run; if set to `false`, the migration will proceed. Implemented in [#11727](https://github.com/blockscout/blockscout/pull/11727). | Version: v7.0.0+
Default: `false`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_VERIFIED_ADDRESSES_BATCH_SIZE` | Specifies the number of addresses to process in each batch during the sanitize verified addresses migration. Implemented in [#11727](https://github.com/blockscout/blockscout/pull/11727). | Version: v7.0.0+
Default: `500`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_VERIFIED_ADDRESSES_CONCURRENCY` | Determines how many concurrent processes will be used during the sanitize verified addresses migration. Implemented in [#11727](https://github.com/blockscout/blockscout/pull/11727). | Version: v7.0.0+
Default: `1`
Applications: API, Indexer |
| `MIGRATION_SANITIZE_VERIFIED_ADDRESSES_TIMEOUT` | Defines the timeout before processing each batch in the sanitize verified addresses migration. Follows the [time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11727](https://github.com/blockscout/blockscout/pull/11727). | Version: v7.0.0+
Default: `0s`
Applications: API, Indexer |
| `MIGRATION_HEAVY_INDEX_OPERATIONS_CHECK_INTERVAL` | Interval between status checks of heavy db operation like index creation or dropping. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11604](https://github.com/blockscout/blockscout/pull/11604) | Version: v7.0.0+
Default: `10m`
Applications: API, Indexer |
| `MIGRATION_TOKEN_INSTANCE_ERC_1155_SANITIZE_CONCURRENCY` | Concurrency for `erc-1155-sanitize` token instance fetcher. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). Default value and name changed in [#11543](https://github.com/blockscout/blockscout/pull/11543) | Version: v7.0.0+
Default: `1`
Applications: Indexer |
| `MIGRATION_TOKEN_INSTANCE_ERC_721_SANITIZE_CONCURRENCY` | Concurrency for `erc-721-sanitize` token instance fetcher. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). Name changed in [#11543](https://github.com/blockscout/blockscout/pull/11543) | Version: v7.0.0+
Default: `2`
Applications: Indexer |
| `MIGRATION_TOKEN_INSTANCE_ERC_1155_SANITIZE_BATCH_SIZE` | Batch size for `erc-1155-sanitize` token instance fetcher. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). Default value and name changed in [#11543](https://github.com/blockscout/blockscout/pull/11543) | Version: v7.0.0+
Default: `500`
Applications: Indexer |
| `MIGRATION_TOKEN_INSTANCE_ERC_721_SANITIZE_BATCH_SIZE` | Batch size for `erc-721-sanitize` token instance fetcher. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). Default value and name changed in [#11543](https://github.com/blockscout/blockscout/pull/11543) | Version: v7.0.0+
Default: `50`
Applications: Indexer |
| `MIGRATION_TOKEN_INSTANCE_ERC_721_SANITIZE_TOKENS_BATCH_SIZE` | Tokens batch size for `erc-721-sanitize` token instance fetcher. Implemented in [#9226](https://github.com/blockscout/blockscout/pull/9226). Name changed in [#11543](https://github.com/blockscout/blockscout/pull/11543) | Version: v7.0.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_BACKFILL_METADATA_URL_DISABLED` | If set to `true`, the backfiller of `metadata_url` field in the `token_instances` table will not start. If set to `false`, the migration proceeds as normal. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: `false`
Applications: Indexer |
| `MIGRATION_BACKFILL_METADATA_URL_BATCH_SIZE` | Defines the number of records to be processed in each batch when backfilling the `metadata_url` field in the `token_instances` table. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_BACKFILL_METADATA_URL_CONCURRENCY` | Specifies how many concurrent processes can handle the `metadata_url` field backfilling. Implemented in [#12102](https://github.com/blockscout/blockscout/pull/12102). | Version: v8.0.0+
Default: `5`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_CONCURRENCY` | Specifies how many concurrent processes can handle the recovery WETH token transfers migration. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0+
Default: `5`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_BATCH_SIZE` | Defines the number of records to be processed in each batch when recovery WETH token transfers. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0+
Default: `50`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_TIMEOUT` | Defines the timeout between processing each batch (`batch_size` \* `concurrency`) in the recovery WETH token transfers migration. Follows the [time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0+
Default: `0s`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_BLOCKS_BATCH_SIZE` | Specifies the block range size selected for the recovery of WETH token transfer migration. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0+
Default: `100000`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_HIGH_VERBOSITY` | If set to `true`, enables high verbosity logging (logs each transaction hash, where missed transfers were restored) during the recovery of WETH token transfer migration. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0+
Default: `true`
Applications: Indexer |
| `MIGRATION_MERGE_ADJACENT_MISSING_BLOCK_RANGES_BATCH_SIZE` | Specifies the missing block range batch size selected for the merge migration. Implemented in [#12778](https://github.com/blockscout/blockscout/pull/12778). | Version: v9.0.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_DELETE_ZERO_VALUE_INTERNAL_TRANSACTIONS_ENABLED` | Enable of delete zero-value calls migration. Implemented in [#13305](https://github.com/blockscout/blockscout/pull/13305). | Version: v9.3.0+
Default: `false`
Applications: Indexer |
| `MIGRATION_DELETE_ZERO_VALUE_INTERNAL_TRANSACTIONS_BATCH_SIZE` | Specifies the block batch size selected for the delete zero-value calls migration. Implemented in [#13305](https://github.com/blockscout/blockscout/pull/13305). | Version: v9.3.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_DELETE_ZERO_VALUE_INTERNAL_TRANSACTIONS_STORAGE_PERIOD` | Specifies the period for which recent zero-value calls won't be deleted in delete zero-value calls migration. Implemented in [#13932](https://github.com/blockscout/blockscout/pull/13932). | Version: v9.3.3+
Default: `30d`
Applications: Indexer |
| `MIGRATION_DELETE_ZERO_VALUE_INTERNAL_TRANSACTIONS_CHECK_INTERVAL` | Specifies the interval between checking of new zero-value calls to be deleted in delete zero-value calls migration. Implemented in [#13305](https://github.com/blockscout/blockscout/pull/13305). | Version: v9.3.0+
Default: `1m`
Applications: Indexer |
| `MIGRATION_EMPTY_INTERNAL_TRANSACTIONS_DATA_BATCH_SIZE` | Number of internal transactions to clear their data in the batch. Implemented in [#13893](https://github.com/blockscout/blockscout/pull/13893). | Version: v10.0.0+
Default: `1000`
Applications: Indexer |
| `MIGRATION_EMPTY_INTERNAL_TRANSACTIONS_DATA_CONCURRENCY` | Number of parallel clearing internal transaction data batches processing. Implemented in [#13893](https://github.com/blockscout/blockscout/pull/13893). | Version: v10.0.0+
Default: `1`
Applications: Indexer |
| `MIGRATION_EMPTY_INTERNAL_TRANSACTIONS_DATA_TIMEOUT` | Timeout between clearing internal transaction data batches processing. Implemented in [#13893](https://github.com/blockscout/blockscout/pull/13893). | Version: v10.0.0+
Default: `0`
Applications: Indexer |
| `MIGRATION_FILL_INTERNAL_TRANSACTIONS_ADDRESS_IDS_BATCH_SIZE` | Number of internal transactions to fill their address ids in the batch. Implemented in [#14204](https://github.com/blockscout/blockscout/pull/14204). | Version: v11.0.0+
Default: `100`
Applications: Indexer |
| `MIGRATION_FILL_INTERNAL_TRANSACTIONS_ADDRESS_IDS_TIMEOUT` | Timeout between filling internal transactions address ids batches processing. Implemented in [#14208](https://github.com/blockscout/blockscout/pull/14208). | Version: v11.0.0+
Default: `0s`
Applications: Indexer |
## Market
| Variable | Description | Parameters |
| -------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
| `DISABLE_MARKET` | Disables all fetchers and any market data displaying. Setting this to `true` will disable all market-related functionality. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `false`
Applications: API, Indexer |
| `MARKET_NATIVE_COIN_SOURCE` | Source for realtime native coin price fetching. Possible values are: `coin_gecko`, `coin_market_cap`, `crypto_rank`, `mobula` and `dia`. Useful when multiple coin IDs are configured and you want to explicitly select the source. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `coin_gecko`
Applications: API |
| `MARKET_SECONDARY_COIN_SOURCE` | Source for realtime secondary coin fetching. Possible values are: `coin_gecko`, `coin_market_cap`, `crypto_rank`, `mobula` and `dia`. Useful when multiple secondary coin IDs are configured. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `coin_gecko`
Applications: API |
| `MARKET_TOKENS_SOURCE` | Sets the source for tokens price fetching. Available values are `coin_gecko`, `crypto_rank`, `mobula`, `dia`. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `coin_gecko`
Applications: Indexer |
| `MARKET_NATIVE_COIN_HISTORY_SOURCE` | Sets the source for price history fetching. Available values are `crypto_compare`, `coin_gecko`, `mobula`, `coin_market_cap`, `crypto_rank` and `dia`. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `crypto_compare`
Applications: Indexer |
| `MARKET_SECONDARY_COIN_HISTORY_SOURCE` | Sets the source for secondary coin price history fetching. Available values are `crypto_compare`, `coin_gecko`, `mobula`, `coin_market_cap`, `crypto_rank` and `dia`. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `crypto_compare`
Applications: Indexer |
| `MARKET_MARKET_CAP_HISTORY_SOURCE` | Sets the source for market cap history fetching. Available values are `coin_gecko` and `coin_market_cap`. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `coin_gecko`
Applications: Indexer |
| `MARKET_TVL_HISTORY_SOURCE` | Sets the source for TVL history fetching. Available value is `defillama`. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `defillama`
Applications: Indexer |
| `MARKET_COINGECKO_PLATFORM_ID` | [CoinGecko](https://www.coingecko.com/) platform id for which token prices are fetched, see full list in [`/asset_platforms`](https://api.coingecko.com/api/v3/asset_platforms) endpoint. Examples: "ethereum", "optimistic-ethereum". Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `ethereum`
Applications: Indexer |
| `MARKET_COINGECKO_BASE_URL` | If set, overrides the Coingecko base URL. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://api.coingecko.com/api/v3`
Applications: API, Indexer |
| `MARKET_COINGECKO_BASE_PRO_URL` | If set, overrides the Coingecko Pro base URL. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://pro-api.coingecko.com/api/v3`
Applications: API, Indexer |
| `MARKET_COINGECKO_API_KEY` | CoinGecko API key. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COINGECKO_COIN_ID` | Sets CoinGecko coin ID. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COINGECKO_SECONDARY_COIN_ID` | Sets CoinGecko coin ID for secondary coin market chart. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COINMARKETCAP_BASE_URL` | If set, overrides the CoinMarketCap base URL (Free and Pro). Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://pro-api.coinmarketcap.com/v2`
Applications: API, Indexer |
| `MARKET_COINMARKETCAP_API_KEY` | CoinMarketCap API key. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COINMARKETCAP_COIN_ID` | CoinMarketCap coin id. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COINMARKETCAP_SECONDARY_COIN_ID` | CoinMarketCap coin id for secondary coin. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_CRYPTOCOMPARE_BASE_URL` | If set, overrides the CryptoCompare base URL. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://min-api.cryptocompare.com`
Applications: API, Indexer |
| `MARKET_CRYPTOCOMPARE_COIN_SYMBOL` | CryptoCompare coin symbol for native coin (e.g., "OP" for Optimism). CryptoCompare uses symbols instead of IDs. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `MARKET_CRYPTOCOMPARE_SECONDARY_COIN_SYMBOL` | CryptoCompare coin symbol for secondary coin market chart. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `MARKET_CRYPTORANK_PLATFORM_ID` | Sets Cryptorank platform ID. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `MARKET_CRYPTORANK_BASE_URL` | If set, overrides the Cryptorank API url. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://api.cryptorank.io/v1/`
Applications: API, Indexer |
| `MARKET_CRYPTORANK_API_KEY` | Cryptorank API key. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_CRYPTORANK_COIN_ID` | Sets Cryptorank coin ID. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_CRYPTORANK_SECONDARY_COIN_ID` | Sets Cryptorank coin ID for secondary coin. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_DEFILLAMA_COIN_ID` | DefiLlama coin id. Use the `name` field from the `/v2/chains` endpoint response (e.g., "OP Mainnet" for Optimism). Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `MARKET_MOBULA_PLATFORM_ID` | Mobula platform ID. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: Indexer |
| `MARKET_MOBULA_BASE_URL` | If set, overrides the Mobula API base URL. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `https://api.mobula.io/api/1`
Applications: API, Indexer |
| `MARKET_MOBULA_API_KEY` | Mobula API key. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_MOBULA_COIN_ID` | Set Mobula coin ID. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_MOBULA_SECONDARY_COIN_ID` | Set Mobula coin ID for secondary coin. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: (empty)
Applications: API, Indexer |
| `MARKET_COIN_FETCHER_ENABLED` | If `false` disables fetching of realtime native coin price. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `true`
Applications: API |
| `MARKET_COIN_CACHE_PERIOD` | Cache period for coin exchange rates. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `10m`
Applications: API |
| `MARKET_TOKENS_FETCHER_ENABLED` | If `false` disables fetching of token prices. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `true`
Applications: Indexer |
| `MARKET_TOKENS_INTERVAL` | Interval between batch requests of token prices. Can be decreased in order to fetch prices faster if you have pro rate limit. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `10s`
Applications: Indexer |
| `MARKET_TOKENS_REFETCH_INTERVAL` | Interval between refetching token prices, responsible for the relevance of prices. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `1h`
Applications: Indexer |
| `MARKET_TOKENS_MAX_BATCH_SIZE` | Batch size of a single token price request. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `500`
Applications: Indexer |
| `MARKET_HISTORY_FETCHER_ENABLED` | If `false` disables fetching of marked data history. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `true`
Applications: Indexer |
| `MARKET_HISTORY_FETCH_INTERVAL` | Interval to update data for the last day in the market history table. Introduced in [#9197](https://github.com/blockscout/blockscout/pull/9197). | Version: v6.1.0+
Default: `1h`
Applications: API, Indexer |
| `MARKET_HISTORY_FIRST_FETCH_DAY_COUNT` | Initial number of days to fetch for market history. Implemented in [#11844](https://github.com/blockscout/blockscout/pull/11844). | Version: v8.0.0+
Default: `365`
Applications: Indexer |
| `MARKET_DIA_BLOCKCHAIN` | Sets DIA platform from [https://www.diadata.org/docs/reference/apis/token-prices/api-endpoints/blockchains](https://www.diadata.org/docs/reference/apis/token-prices/api-endpoints/blockchains). Implemented in [#12678](https://github.com/blockscout/blockscout/pull/12678). | Version: v9.3.0+
Default: (empty)
Applications: Indexer |
| `MARKET_DIA_BASE_URL` | If set, overrides the DIA API url. Implemented in [#12678](https://github.com/blockscout/blockscout/pull/12678). | Version: v9.3.0+
Default: `https://api.diadata.org/v1`
Applications: API, Indexer |
| `MARKET_DIA_COIN_ADDRESS_HASH` | Sets address hash for native coin in DIA. Implemented in [#12678](https://github.com/blockscout/blockscout/pull/12678). | Version: v9.3.0+
Default: (empty)
Applications: API |
| `MARKET_DIA_SECONDARY_COIN_ADDRESS_HASH` | Sets address hash for secondary coin in DIA. Implemented in [#12678](https://github.com/blockscout/blockscout/pull/12678). | Version: v9.3.0+
Default: (empty)
Applications: API |
## Cache Management
See the [Time format](/setup/env-variables/backend-env-variables#time-format) section for more information on variable formatting.
| Variable | Description | Parameters |
| ----------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------ |
| `CACHE_ADDRESS_COUNT_PERIOD` | Interval for restarting the task that calculates the total number of addresses. | Version: v8.0.0+
Default: `30m`
Applications: API, Indexer |
| `CACHE_ADDRESS_SUM_PERIOD` | Time to live of addresses sum (except burn address) cache. [Time format](/setup/env-variables/backend-env-variables#time-format). Starting from release v6.8.0+, if the value is not set, ttl value gradually increases until the default value with growth of the block numbers. Introduced in [#2862](https://github.com/poanetwork/blockscout/pull/2862). | Version: v4.1.3+
Default: `1h`
Applications: API, Indexer |
| `CACHE_ADDRESS_TRANSACTIONS_GAS_USAGE_COUNTER_PERIOD` | Interval to restart the task which calculates gas usage at the address. | Version: v4.1.3+
Default: `30m`
Applications: API, Indexer |
| `CACHE_ADDRESS_TRANSACTIONS_COUNTER_PERIOD` | Time to live of address' transaction counter. [Time format](/setup/env-variables/backend-env-variables#time-format). Introduced in [#3330](https://github.com/poanetwork/blockscout/pull/3330). | Version: v3.4.0+
Default: `1h`
Applications: API, Indexer |
| `CACHE_ADDRESS_TOKENS_USD_SUM_PERIOD` | Managing of cache invalidation period for the sum of USD value of tokens per tokens' holder address. | Version: v3.5.0+
Default: `1h`
Applications: API, Indexer |
| `CACHE_ADDRESS_TOKEN_TRANSFERS_COUNTER_PERIOD` | Interval to restart the task, which calculates the number of token transfers at the address. Implemented in [#4699](https://github.com/poanetwork/blockscout/pull/4699). | Version: v4.0.0+
Default: `1h`
Applications: API, Indexer |
| `CACHE_TOTAL_GAS_USAGE_PERIOD` | Interval to restart the task which calculates the total gas usage. Starting from release v6.8.0+, if the value is not set, ttl value gradually increases until the default value with growth of the block numbers. | Version: v4.1.3+
Default: `2h`
Applications: API, Indexer |
| `CACHE_TOKEN_HOLDERS_COUNTER_PERIOD` | Interval to restart the task which calculates holders count of the token. | Version: v4.1.3+
Default: `1h`
Applications: API, Indexer |
| `CACHE_TOKEN_TRANSFERS_COUNTER_PERIOD` | Interval to restart the task which calculates transfers count of the token. | Version: v4.1.3+
Default: `1h`
Applications: API, Indexer |
| `TOKEN_METADATA_UPDATE_INTERVAL` | Interval to restart the task which updates token metadata. | Version: v2.0.1+
Default: `48h`
Applications: API, Indexer |
| `TOKEN_COUNTERS_UPDATE_INTERVAL` | Interval to restart the task which updates token counters (transfers count and holders count). | Version: v9.0.0+
Default: `3h`
Applications: Indexer |
| `CACHE_AVERAGE_BLOCK_PERIOD` | Time to initiate first calculation and caching of average block period after start/re-start of the application. | Version: v4.1.3+
Default: `30m`
Applications: API, Indexer |
| `CACHE_AVERAGE_BLOCK_TIME_WINDOW` | The number of blocks to be taken into account in the calculations. Introduced in [#13470](https://github.com/blockscout/blockscout/pull/13470). | Version: v9.2.0+
Default: `100`
Applications: API, Indexer |
| `CACHE_MARKET_HISTORY_PERIOD` | Update of market history cache. | Version: v4.1.3+
Default: `1h`
Applications: API, Indexer |
| `TOKEN_BALANCE_ON_DEMAND_FETCHER_THRESHOLD` | A threshold to invalidate token balance cache. | Version: v5.1.2+
Default: `1h`
Applications: API, Indexer |
| `COIN_BALANCE_ON_DEMAND_FETCHER_THRESHOLD` | A threshold to invalidate coin balance cache. | Version: v5.1.2+
Default: `1h`
Applications: API, Indexer |
| `CONTRACT_CODE_ON_DEMAND_FETCHER_THRESHOLD` | An initial threshold (for exponential backoff) to fetch smart-contract bytecode on-demand. Implemented in [#9708](https://github.com/blockscout/blockscout/pull/9708). | Version: v6.4.0+
Default: `5s`
Applications: API, Indexer |
| `CACHE_BLOCK_COUNT_PERIOD` | Time to live of blocks with consensus count cache. Starting from release v6.8.0+, if the value is not set, ttl value gradually increases until the default value with growth of the block numbers. Introduced in [#1876](https://github.com/poanetwork/blockscout/pull/1876). | Version: v4.1.3+
Default: `2h`
Applications: API, Indexer |
| `CACHE_TOTAL_GAS_USAGE_COUNTER_ENABLED` | if `true`, enables cache for total gas usage counter. | Version: v5.1.3+
Default: `false`
Applications: API, Indexer |
| `CACHE_TXS_COUNT_PERIOD` | Time interval to restart the task that calculates the total txs count. Starting from release v6.8.0+, if the value is not set, ttl value gradually increases until the default value with growth of the block numbers. | Version: v4.1.3+
Default: `2h`
Applications: API, Indexer |
| `CACHE_TRANSACTIONS_24H_STATS_PERIOD` | Interval to update data for the last 24 hours transactions stats. Introduced in [#9483](https://github.com/blockscout/blockscout/pull/9483). | Version: v6.3.0+
Default: `1h`
Applications: API, Indexer |
| `CACHE_FRESH_PENDING_TRANSACTIONS_COUNTER_PERIOD` | Interval to update count of pending transactions that appeared less than half an hour ago. Introduced in [#9483](https://github.com/blockscout/blockscout/pull/9483). | Version: v6.3.0+
Default: `5m`
Applications: API, Indexer |
| `CACHE_OPTIMISM_LAST_OUTPUT_ROOT_SIZE_COUNTER_PERIOD` | Interval to update data for the last output root size counter. Introduced in [#9532](https://github.com/blockscout/blockscout/pull/9532). | Version: v6.3.0+
Default: `5m`
Applications: API, Indexer |
| `CACHE_PENDING_OPERATIONS_COUNT_PERIOD` | Time interval to restart the task which calculates the total pending operations count. Introduced in [#12474](https://github.com/blockscout/blockscout/pull/12474). | Version: v10.0.0+
Default: `5m`
Applications: API, Indexer |
## Gas Price Oracle
| Variable | Description | Parameters |
| ------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| `GAS_PRICE_ORACLE_NUM_OF_BLOCKS` | Gas price oracle: number of blocks to calculate average gas price from | Version: v4.1.4+
Default: `200`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_SAFELOW_PERCENTILE` | Gas price oracle: safelow percentile | Version: v4.1.4+
Default: `35`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_AVERAGE_PERCENTILE` | Gas price oracle: average percentile | Version: v4.1.4+
Default: `60`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_FAST_PERCENTILE` | Gas price oracle: fast percentile | Version: v4.1.4+
Default: `90`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_CACHE_PERIOD` | Gas price oracle: period of gas prices update. | Version: v4.1.4+
Default: `30s`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_SIMPLE_TRANSACTION_GAS` | Gas price oracle: amount of gas for a simple coin transfer. Introduced in [#9044](https://github.com/blockscout/blockscout/pull/9044). | Version: v6.0.0+
Default: `21000`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_SAFELOW_TIME_COEFFICIENT` | Average block time multiplied by this coefficient for safelow gas price when time from pending transactions is not available. Floats may be used. Introduced in [#9582](https://github.com/blockscout/blockscout/pull/9582). | Version: v6.3.0+
Default: `5`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_AVERAGE_TIME_COEFFICIENT` | Average block time multiplied by this coefficient for average gas price when time from pending transactions is not available. Floats may be used. Introduced in [#9582](https://github.com/blockscout/blockscout/pull/9582). | Version: v6.3.0+
Default: `3`
Applications: API, Indexer |
| `GAS_PRICE_ORACLE_FAST_TIME_COEFFICIENT` | Average block time multiplied by this coefficient for fast gas price when time from pending transactions is not available. Floats may be used. Introduced in [#9582](https://github.com/blockscout/blockscout/pull/9582). | Version: v6.3.0+
Default: `1`
Applications: API, Indexer |
## Main Page Dashboard
| Variable | Description | Parameters | | |
| ----------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------- | - | --------------------------------------------------------------- |
| `GAS_PRICE` | Gas price in Gwei. If the variable is present, gas price displays on the main page. | Version: v3.3.2+
Default: (empty)
Applications: API | | |
| `TXS_STATS_ENABLED` | Disables or enables txs per day stats gathering. | Version: v5.1.3+
Default: `true`
Applications: API | | |
| `SHOW_PRICE_CHART` | Disables or enables price and market cap of coin charts on the main page. | Version: v3.1.2+
Default: `false`
Applications: API | | |
| `SHOW_PRICE_CHART_LEGEND` | Showa price and market cap values under the chart even if price chart is not enabled via `SHOW_PRICE_CHART` env variable. | Version: v5.1.4+
Default: `false`
Applications: API | | |
| `SHOW_TXS_CHART` | Disables or enables txs count per day chart on the main page. | Version: v3.1.2+
Default: `true`
Applications: API | | |
| `TXS_HISTORIAN_INIT_LAG` | The initial delay in txs count history fetching in order to display txs count per day history chart on the main page. [Time format](/setup/env-variables/backend-env-variables#time-format). | Version: v3.1.2+
Default: `0`
Applications: API | | |
| `TXS_STATS_DAYS_TO_COMPILE_AT_INIT` | Number of days for fetching of history of txs count per day in order to display it in txs count per day history chart on the main page. | Version: v3.1.2+
Default: `40`
Applications: API | | Version: v5.1.3+
Default: (empty)
Applications: API |
## Contract Management
| Variable | Description | Parameters |
| ------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `CONTRACT_VERIFICATION_ALLOWED_SOLIDITY_EVM_VERSIONS` | Comma-separated list of allowed EVM versions for Solidity contract verification. This var was introduced in [#1964](https://github.com/poanetwork/blockscout/pull/1964), updated in [#7614](https://github.com/blockscout/blockscout/pull/7614). | Version: v5.2.0+
Default: `homestead,tangerineWhistle,spuriousDragon,byzantium,constantinople,petersburg,istanbul,berlin,london,paris,shanghai,cancun,prague,osaka,default`
Applications: API |
| `CONTRACT_VERIFICATION_ALLOWED_VYPER_EVM_VERSIONS` | Comma-separated list of allowed EVM versions for Vyper contract verification. This var was introduced in [#7614](https://github.com/blockscout/blockscout/pull/7614). | Version: v5.2.0+
Default: `byzantium,constantinople,petersburg,istanbul,berlin,paris,shanghai,cancun,osaka,default`
Applications: API |
| `CONTRACT_VERIFICATION_MAX_LIBRARIES` | Max amount of libraries to consider in smart-contract verification from flat/multi-part file(s). Implemented in [#6204](https://github.com/blockscout/blockscout/pull/6204). | Version: v5.0.0+
Default: (empty)
Applications: API |
| `CONTRACT_MAX_STRING_LENGTH_WITHOUT_TRIMMING` | Hide long contract method data. For more details: [#4667](https://github.com/blockscout/blockscout/pull/4667) | Version: v4.0.0+
Default: `2040`
Applications: API |
| `CONTRACT_DISABLE_INTERACTION` | If `true`, contract interactions via "Write contract" or "Write proxy contract" tabs are disabled. Introduced in [#7088](https://github.com/blockscout/blockscout/pull/7088)." | Version: v5.1.2+
Default: (empty)
Applications: API |
| `CONTRACT_PROXY_IMPLEMENTATION_TTL_VIA_AVG_BLOCK_TIME` | If `false`, proxy contract implementation will be re-fetched immediately once someone opens proxy page bypassing average block time calculation. Implemented in [#9155](https://github.com/blockscout/blockscout/pull/9155). | Version: v6.1.0+
Default: `true`
Applications: API |
| `CONTRACT_AUDIT_REPORTS_AIRTABLE_URL` | URL of Airtable to store audit reports from users. Implemented in [#9120](https://github.com/blockscout/blockscout/pull/9120) | Version: v6.1.0+
Default: (empty)
Applications: API |
| `CONTRACT_AUDIT_REPORTS_AIRTABLE_API_KEY` | Access token for `CONTRACT_AUDIT_REPORTS_AIRTABLE_URL`. Implemented in [#9120](https://github.com/blockscout/blockscout/pull/9120) | Version: v6.1.0+
Default: (empty)
Applications: API |
| `CONTRACT_CERTIFIED_LIST` | Comma-separated list of smart-contract address hashes, to which "certified" flag should be applied. Implemented in [#9910](https://github.com/blockscout/blockscout/pull/9910)" | Version: v6.5.0+
Default: (empty)
Applications: API |
| `WHITELISTED_WETH_CONTRACTS` | Comma-separated list of smart-contract address hashes of WETH-like tokens which deposit and withdrawal events you'd like to index. Implemented in [#10134](https://github.com/blockscout/blockscout/pull/10134) | Version: v6.8.0+
Default: (empty)
Applications: API, Indexer |
| `WETH_TOKEN_TRANSFERS_FILTERING_ENABLED` | Toggle for WETH token transfers filtering which was introduced in [#10134](https://github.com/blockscout/blockscout/pull/10134). Implemented in [#10208](https://github.com/blockscout/blockscout/pull/10208) | Version: v6.1.0+
Default: `false`
Applications: API, Indexer |
| `CONTRACT_ENABLE_PARTIAL_REVERIFICATION` | Toggle for enabling re-verification from partial to partial match. Implemented in [#11737](https://github.com/blockscout/blockscout/pull/11737) | Version: v7.0.0+
Default: `false`
Applications: API |
## Bridged Tokens
| Variable | Description | Parameters |
| ----------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| `BRIDGED_TOKENS_ENABLED` | Variable to enable bridged tokens functionality. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Needs Recompile: ☑️ Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
| `BRIDGED_TOKENS_ETH_OMNI_BRIDGE_MEDIATOR` | OMNI bridge mediator for ETH tokens. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
| `BRIDGED_TOKENS_BSC_OMNI_BRIDGE_MEDIATOR` | OMNI bridge mediator for BSC tokens. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
| `BRIDGED_TOKENS_POA_OMNI_BRIDGE_MEDIATOR` | OMNI bridge mediator for POA tokens. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
| `BRIDGED_TOKENS_AMB_BRIDGE_MEDIATORS` | AMB bridge mediator. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
| `BRIDGED_TOKENS_FOREIGN_JSON_RPC` | Ethereum mainnet JSON RPC. Introduced in [#9169](https://github.com/blockscout/blockscout/pull/9169) | Version: v6.1.0+
Default: (empty)
Applications: API, Indexer |
## Miscellaneous UI
| Variable | Description | Parameters |
| ------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------- |
| `HIDE_SCAM_ADDRESSES` | Hides address of EOA/smart-contract/token from search results if the value is `true` and "scam" badge is assigned to that address. Implemented in [#10763](https://github.com/blockscout/blockscout/pull/10763) | Version: v6.9.0+
Default: (empty)
Applications: API |
| `UNCLES_IN_AVERAGE_BLOCK_TIME` | Include or exclude non-consensus blocks in avg block time calculation. Exclude if `false`. | Version: v2.0.1+
Default: `false`
Applications: API |
| `COIN_BALANCE_HISTORY_DAYS` | Number of days to consider for coin balance history chart. | Version: v3.1.3+
Default: `10`
Applications: API |
## CSV Export
When `CSV_EXPORT_ASYNC_ENABLED` is `true`, supported CSV export endpoints create a tracked request, enqueue a background job, write the CSV to a temporary file, upload it to Gokapi, and return a `request_id` for polling instead of streaming the CSV directly in the HTTP response.
| Variable | Description | Parameters |
| -------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| `CSV_EXPORT_LIMIT` | Changes the max number of rows pulled by the CSV export logic. Applies to both sync and async CSV export paths. Implemented in [#10497](https://github.com/blockscout/blockscout/pull/10497) | Version: v6.8.0+
Default: `10000`
Applications: API |
| `CSV_EXPORT_ASYNC_ENABLED` | Enables async CSV export for supported endpoints. When enabled, the API returns `202 Accepted` with a `request_id` and processes exports through Oban instead of streaming them directly. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `false`
Applications: API |
| `CSV_EXPORT_ASYNC_OBAN_CONCURRENCY` | Sets Oban concurrency for the `csv_export` queue used by async CSV exports. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `10`
Applications: API |
| `CSV_EXPORT_ASYNC_GOKAPI_URL` | Base URL of the Gokapi instance used to store completed async CSV exports. Trailing slash is stripped during validation. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: Yes, if async export is enabled
Default: (empty)
Applications: API |
| `CSV_EXPORT_ASYNC_GOKAPI_API_KEY` | API key sent to Gokapi in the `apikey` header for async CSV export uploads. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: Yes, if async export is enabled
Default: (empty)
Applications: API |
| `CSV_EXPORT_ASYNC_MAX_PENDING_TASKS_PER_IP` | Maximum number of pending async CSV export requests allowed per client IP at once. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `3`
Applications: API |
| `CSV_EXPORT_ASYNC_UPLOAD_CHUNK_SIZE` | Chunk size in bytes for reading the generated CSV file and uploading it to Gokapi. Should be synchronized with Gokapi settings. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `47185920`
Applications: API |
| `CSV_EXPORT_DB_TIMEOUT` | Timeout for CSV export database work. Follows the [time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `1h` if async export is enabled, otherwise `5m`
Applications: API |
| `CSV_EXPORT_ASYNC_TMP_DIR` | Directory used for in-progress async CSV export files before they are uploaded to Gokapi. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `/tmp/csv_export`
Applications: API |
| `CSV_EXPORT_ASYNC_GOKAPI_TIMEOUT` | HTTP timeout and `recv_timeout` used for Gokapi requests during async CSV export. Follows the [time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `60s`
Applications: API |
| `CSV_EXPORT_ASYNC_GOKAPI_UPLOAD_EXPIRY_DAYS` | Sets Gokapi `expiryDays` for completed async CSV export uploads. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `1`
Applications: API |
| `CSV_EXPORT_ASYNC_GOKAPI_UPLOAD_ALLOWED_DOWNLOADS` | Sets Gokapi `allowedDownloads` for completed async CSV export uploads. Implemented in [#14028](https://github.com/blockscout/blockscout/pull/14028) | Version: v11.0.0+ Required: No
Default: `1`
Applications: API |
## reCAPTCHA
Use Invisible reCAPTCHA v2 for the latest versions. If using a previous version only choose v2 or v3, do not use both (we recommend v2). reCAPTCHA v3 support may be discontinued in future updates. [More info on reCAPTCHA settings available here](/setup/configuration-options/recaptcha).
| Variable | Description | Parameters |
| ---------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| `RE_CAPTCHA_SECRET_KEY` | Google reCAPTCHA v2 secret key. Used by advanced CSV export. Implemented in [#4747](https://github.com/blockscout/blockscout/pull/4747) | Version: v4.0.0+
Default: (empty)
Applications: API |
| `RE_CAPTCHA_CLIENT_KEY` | Google reCAPTCHA v2 client key. Used by advanced CSV export in the embedded old UI. You don't need to set it for [the new UI](https://github.com/blockscout/frontend). Implemented in [#4747](https://github.com/blockscout/blockscout/pull/4747) | Version: v4.0.0+
Default: (empty)
Applications: API |
| `RE_CAPTCHA_V3_SECRET_KEY` | **Only compatible with frontend version v1.36.x. For later versions, use Invisible reCAPTCHA v2.** Google reCAPTCHA v3 secret key. Used by advanced CSV export. Implemented in [#7273](https://github.com/blockscout/blockscout/pull/7273) | Version: v5.1.4+
Default: (empty)
Applications: API |
| `RE_CAPTCHA_V3_CLIENT_KEY` | **Only compatible with frontend version v1.36.x. For later versions, use Invisible reCAPTCHA v2.** Google reCAPTCHA v3 client key. Used by advanced CSV export. Implemented in [#7273](https://github.com/blockscout/blockscout/pull/7273) | Version: v5.1.4+
Default: (empty)
Applications: API |
| `RE_CAPTCHA_DISABLED` | Disable reCAPTCHA. Implemented in [#7416](https://github.com/blockscout/blockscout/pull/7416) | Version: v5.1.5+
Default: `false`
Applications: API |
| `RE_CAPTCHA_CHECK_HOSTNAME` | Disable reCAPTCHA hostname check. More details on [reCaptcha docs](https://developers.google.com/recaptcha/docs/domain_validation). Implemented in [#10706](https://github.com/blockscout/blockscout/pull/10706) | Version: v6.9.0+
Default: `true`
Applications: API |
| `RE_CAPTCHA_SCORE_THRESHOLD` | Changes reCAPTCHA score threshold. Implemented in [#11182](https://github.com/blockscout/blockscout/pull/11182) | Version: v6.9.1+
Default: `0.5`
Applications: API |
| `RE_CAPTCHA_BYPASS_TOKEN` | Bypass token that allows to skip reCAPTCHA check. Implemented in [#11682](https://github.com/blockscout/blockscout/pull/11682) | Version: v6.10.2+
Default: (empty)
Applications: API |
| `RE_CAPTCHA_TOKEN_INSTANCE_REFETCH_METADATA_SCOPED_BYPASS_TOKEN` | API key that allows to skip reCAPTCHA check for requests to `/api/v2/tokens/{token_hash}/instances/{token_id}/refetch-metadata` endpoint. Implemented in [#12147](https://github.com/blockscout/blockscout/pull/12147) | Version: v8.0.0+
Default: (empty)
Applications: API |
## API Rate Limits
| Variable | Description | Parameters |
| ------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- |
| `API_RATE_LIMIT_BY_IP` | Global rate limit for an IP address for API v2 requests sent from UI. [#7148](https://github.com/blockscout/blockscout/pull/7148) | Version: v5.1.3+
Default: `300`
Applications: API |
| `API_RATE_LIMIT_BY_IP_TIME_INTERVAL` | Time interval of rate limit set by `API_RATE_LIMIT_BY_IP`. Implemented in [#7148](https://github.com/blockscout/blockscout/pull/7148) | Version: v5.1.3+
Default: `1m`
Applications: API |
| `API_RATE_LIMIT_BY_WHITELISTED_IP` | A dedicated API rate limit for whitelisted IPs. Implemented in [#5090](https://github.com/blockscout/blockscout/pull/5090) | Version: v5.1.3+
Default: `25 req/sec`
Applications: API |
| `API_RATE_LIMIT_BY_WHITELISTED_IP_TIME_INTERVAL` | Time interval for API rate limit by whitelisted IP. [Time format](\[backend-env-variables.md]\(http://backend-env-variables.md\)#time-format). Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: `1s`
Applications: API |
| `API_RATE_LIMIT_BY_KEY_TIME_INTERVAL` | Time interval for API rate limit by key. [Time format](\[backend-env-variables.md]\(http://backend-env-variables.md\)#time-format). Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: `1s`
Applications: API |
| `API_RATE_LIMIT_BY_ACCOUNT_API_KEY_TIME_INTERVAL` | Time interval for API rate limit by account API key. [Time format](\[backend-env-variables.md]\(http://backend-env-variables.md\)#time-format). Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: `1s`
Applications: API |
| `API_RATE_LIMIT_BY_KEY` | A dedicated API rate limit per key for every type of API key (static or generated from Account module). Implemented in [#5080](https://github.com/blockscout/blockscout/pull/5080) | Version: v4.1.1+
Default: `10 req/sec`
Applications: API |
| `API_RATE_LIMIT_UI_V2_WITH_TOKEN` | Rate limit after submitting correct CAPTCHA. Implemented in [#7148](https://github.com/blockscout/blockscout/pull/7148) | Version: v5.1.3+
Default: `5`
Applications: API |
| `API_RATE_LIMIT_UI_V2_WITH_TOKEN_TIME_INTERVAL` | Time interval for API rate limit for UI v2 with token. [Time format](\[backend-env-variables.md]\(http://backend-env-variables.md\)#time-format). Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: `1s`
Applications: API |
| `API_RATE_LIMIT_WHITELISTED_IPS` | Comma-separated whitelisted IPs list with dedicated rate limit. Implemented in [#5090](https://github.com/blockscout/blockscout/pull/5090) | Version: v4.1.1+
Default: (empty)
Applications: API |
| `API_RATE_LIMIT_STATIC_API_KEY` | Static API key with dedicated API rate limit. Implemented in [#5080](https://github.com/blockscout/blockscout/pull/5080) | Version: v4.1.1+
Default: (empty)
Applications: API |
| `API_NO_RATE_LIMIT_API_KEY` | API key with no rate limit. Implemented in [#10515](https://github.com/blockscout/blockscout/pull/10515) | Version: v6.8.0+
Default: (empty)
Applications: API |
| `API_RATE_LIMIT_DISABLED` | If `true`, any type of rate limit is ignored. Implemented in [#6908](https://github.com/blockscout/blockscout/pull/6908) | Version: v5.1.0+
Default: `false`
Applications: API |
| `API_RATE_LIMIT_IS_BLOCKSCOUT_BEHIND_PROXY` | If `true`, then IP address of a client will be derived from proxy's headers (like `X-Forwarded-For`) using [RemoteIp](https://hexdocs.pm/remote_ip/RemoteIp.html) library. Implemented in [#7148](https://github.com/blockscout/blockscout/pull/7148) | Version: v5.1.3+
Default: `false`
Applications: API |
| `API_RATE_LIMIT_UI_V2_TOKEN_TTL` | TTL for token issued after submitting correct CAPTCHA for an API v2 requests from UI. [Time format](\[backend-env-variables.md]\(http://backend-env-variables.md\)#time-format). Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: `30m`
Applications: API |
| `API_RATE_LIMIT_CONFIG_URL` | URL to fetch API rate limit configuration from external source. Implemented in [#12386](https://github.com/blockscout/blockscout/pull/12386) | Version: v9.0.0+
Default: (empty)
Applications: API |
| `API_RATE_LIMIT_HAMMER_REDIS_URL` | Redis DB URL for Hammer rate limit library. Implemented in [#7148](https://github.com/blockscout/blockscout/pull/7148) | Needs Recompile: ☑️ Version: v5.1.3+
Default: (empty)
Applications: API |
| `API_RATE_LIMIT_REMOTE_IP_HEADERS` | Comma separated list of HTTP headers to extract the real client IP address when Blockscout is behind a proxy for rate limiting purposes. Implemented in [#12386](https://github.com/blockscout/blockscout/pull/13082) | Version: v9.1.0+
Default: `x-forwarded-for`
Applications: API |
| `API_RATE_LIMIT_REMOTE_IP_KNOWN_PROXIES` | Comma separated list of trusted proxy IP addresses or CIDR ranges that are allowed to set the client IP headers for rate limiting. Implemented in [#12386](https://github.com/blockscout/blockscout/pull/13082) | Version: v9.1.0+
Default: `(empty)`
Applications: API |
| `ETH_JSON_RPC_MAX_BATCH_SIZE` | Max batch size for Eth JSON RPC requests. Implemented in [#9409](https://github.com/blockscout/blockscout/pull/9409) | Version: v6.3.0+
Default: `5`
Applications: API |
## General application rate Limits
| Variable | Description | Parameters |
| -------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------- |
| `RATE_LIMITER_REDIS_URL` | Redis DB URL for rate limiter. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: (empty)
Applications: API |
| `RATE_LIMITER_ON_DEMAND_TIME_INTERVAL` | Time interval of rate limit for on-demand fetchers. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: `5s`
Applications: API |
| `RATE_LIMITER_ON_DEMAND_LIMIT_BY_IP` | Rate limit for an IP address for on-demand fetcher call. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: `100`
Applications: API |
| `RATE_LIMITER_ON_DEMAND_EXPONENTIAL_TIMEOUT_COEFF` | Coefficient to calculate exponential timeout for on-demand rate limit. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: `100`
Applications: API |
| `RATE_LIMITER_ON_DEMAND_MAX_BAN_INTERVAL` | Max time an IP address can be banned from on-demand fetcher calls. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: `1h`
Applications: API |
| `RATE_LIMITER_ON_DEMAND_LIMITATION_PERIOD` | Time after which the number of bans for the IP address will be reset. Implemented in [#12218](https://github.com/blockscout/blockscout/pull/12218) | Version: v8.0.0+
Default: `1h`
Applications: API |
## GraphQL API
| Variable | Description | Parameters |
| -------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `API_GRAPHQL_ENABLED` | Enabling/disabling of GraphQL API. Implemented in [#9751](https://github.com/blockscout/blockscout/pull/9751) | Version: v6.4.0+
Default: `true`
Applications: API |
| `API_GRAPHQL_MAX_COMPLEXITY` | Limits the cost of GraphQL API queries. For more details, see the [`max_complexity`](https://hexdocs.pm/absinthe/complexity-analysis.html#complexity-analysis) documentation. Implemented in [#9751](https://github.com/blockscout/blockscout/pull/9751), updated in [#11843](https://github.com/blockscout/blockscout/pull/11843) | Needs Recompile: ☑️ Version: v6.4.0+
Default: `100`
Applications: API |
| `API_GRAPHQL_TOKEN_LIMIT` | Query [token\_limit](https://hexdocs.pm/absinthe/complexity-analysis.html#token-limits) of Absinthe. Implemented in [#9751](https://github.com/blockscout/blockscout/pull/9751) | Needs Recompile: ☑️
Version: v6.4.0+
Default: `1000`
Applications: API |
| `API_GRAPHQL_DEFAULT_TRANSACTION_HASH` | Default transaction hash in a sample query to GraphiQL. Implemented in [#9751](https://github.com/blockscout/blockscout/pull/9751). | Needs Recompile: ☑️
Version: v6.4.0+
Default: `0x69e3923eef50eada197c3336d546936d0c994211492c9f947a24c02827568f9f`
Applications: API |
| `API_GRAPHQL_RATE_LIMIT` | A global GraphQL API rate limit: number or requests per second for all users. Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: `10 req/sec`
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_BY_KEY` | A dedicated GraphQL API rate limit per static key. If this limit is less than stated in API plan, then `API_GRAPHQL_RATE_LIMIT_BY_KEY` used for key generated from Account module. Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: `10 req/sec`
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_STATIC_API_KEY` | Static GraphQL API key with dedicated GraphQL API rate limit. Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: (empty)
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_DISABLED` | If `true`, any type of rate limit is ignored. Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: (empty)
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_BY_IP` | Global rate limit for an IP address for GraphQL API requests. [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: `500`
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_TIME_INTERVAL` | Time interval of rate limit. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: `1s`
Applications: API |
| `API_GRAPHQL_RATE_LIMIT_BY_IP_TIME_INTERVAL` | Time interval of rate limit set by `API_GRAPHQL_RATE_LIMIT_BY_IP`. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#9771](https://github.com/blockscout/blockscout/pull/9771) | Version: v6.4.0+
Default: `1h`
Applications: API |
## Account Related
| Variable | Description | Parameters |
| --------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ |
| `ACCOUNT_ENABLED` | Turn on/off account functionality. If value is`true`, account functionality is enabled. | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_DATABASE_URL` | Account DB connection string | Version: v5.0.0+
Default: value from `DATABASE_URL`
Applications: API |
| `ACCOUNT_REDIS_URL` | Account Redis connection string (for session storing configuration) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_POOL_SIZE` | Account DB `pool_size` | Version: v5.0.0+
Default: `50`
Applications: API |
| `ACCOUNT_AUTH0_DOMAIN` | Domain for [Ueberauth Auth0](https://hexdocs.pm/ueberauth_auth0/readme.html) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_AUTH0_CLIENT_ID` | Auth0 client ID [Ueberauth Auth0](https://hexdocs.pm/ueberauth_auth0/readme.html) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_AUTH0_CLIENT_SECRET` | Auth0 client secret [Ueberauth Auth0](https://hexdocs.pm/ueberauth_auth0/readme.html) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_AUTH0_APPLICATION_ID` | Specifies the identifier for the application within Auth0. It's used to namespace user metadata in migrated Auth0 tenants. Implemented in [#12109](https://github.com/blockscout/blockscout/pull/12109). | Version: v8.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_SENDGRID_API_KEY` | Sendgrid API key for watchlist notifications functionality | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_SENDGRID_SENDER` | Sendgrid sender email for watchlist notifications functionality | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_SENDGRID_TEMPLATE` | Sendgrid email template for watchlist notifications functionality | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_CLOAK_KEY` | Account DB encryption key. [Instruction how to generate](https://hexdocs.pm/cloak_ecto/generate_keys.html#content) | Version: v5.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_VERIFICATION_EMAIL_RESEND_INTERVAL` | Time before resending confirmation email. Implemented in [#7298](https://github.com/blockscout/blockscout/pull/7298). | Version: v5.1.5+
Default: `5m`
Applications: API |
| `ACCOUNT_PRIVATE_TAGS_LIMIT` | Limit for address & transaction tags. Implemented in [#8528](https://github.com/blockscout/blockscout/pull/8528). | Version: v5.3.1+
Default: `2000`
Applications: API |
| `ACCOUNT_WATCHLIST_ADDRESSES_LIMIT` | Limit for watch list addresses. Implemented in [#8528](https://github.com/blockscout/blockscout/pull/8528). | Version: v5.3.1+
Default: `15`
Applications: API |
| `ACCOUNT_WATCHLIST_NOTIFICATIONS_LIMIT_FOR_30_DAYS` | Per account limit for watch list notifications sent for the last 30 days. Implemented in [#8966](https://github.com/blockscout/blockscout/pull/8966). | Version: v5.3.3+
Default: `1000`
Applications: API |
| `ACCOUNT_OTP_RESEND_INTERVAL` | Time before resending otp email. Implemented in [#10706](https://github.com/blockscout/blockscout/pull/10706). | Version: v6.9.0+
Default: `1m`
Applications: API |
| `ACCOUNT_SIWE_MESSAGE` | Message for Sign In With Ethereum authentication. Implemented in [#11178](https://github.com/blockscout/blockscout/pull/11178). | Version: v6.9.1+
Default: `Sign in to Blockscout Account V2`
Applications: API |
| `ACCOUNT_DYNAMIC_ENV_ID` | Dynamic Environment ID, can be found here [https://app.dynamic.xyz/dashboard/developer/api](https://app.dynamic.xyz/dashboard/developer/api). Implemented in [#13786](https://github.com/blockscout/blockscout/pull/13786). | Version: v10.0.0+
Default: (empty)
Applications: API |
| `ACCOUNT_SENDGRID_OTP_TEMPLATE` | Sendgrid email OTP template for login with email functionality. Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
| `ACCOUNT_KEYCLOAK_DOMAIN` | Domain for [Keycloak](https://www.keycloak.org/). Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
| `ACCOUNT_KEYCLOAK_REALM` | Realm for [Keycloak](https://www.keycloak.org/). Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
| `ACCOUNT_KEYCLOAK_CLIENT_ID` | [Keycloak](https://www.keycloak.org/) client ID. Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
| `ACCOUNT_KEYCLOAK_CLIENT_SECRET` | [Keycloak](https://www.keycloak.org/) client secret. Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
| `ACCOUNT_KEYCLOAK_EMAIL_WEBHOOK_URL` | URL address where new email users are reported. Implemented in [#14068](https://github.com/blockscout/blockscout/pull/14068). | Version: v10.1.0+, v9.4.0+
Default: (empty)
Applications: API |
## Specific Smart Contracts
| Variable | Description | Parameters |
| ----------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| `METADATA_CONTRACT` | Used by POA Network to obtain Validators information to display in the UI. | Version: all
Default: (empty)
Applications: API, Indexer |
| `VALIDATORS_CONTRACT` | Used by POA Network to obtain the list of current validators. | Version: all
Default: (empty)
Applications: API, Indexer |
| `KEYS_MANAGER_CONTRACT` | Used by POA Network to set KeysManager proxy contract in order to obtain payout key by mining key. This needs to identify distributed reward to the validator. | Version: v3.1.2+
Default: (empty)
Applications: API, Indexer |
| `REWARDS_CONTRACT` | Emission rewards contract address. This env var is used only if `EMISSION_FORMAT` is set to `POA` | Version: v2.0.4+
Default: `0xeca443e8e1ab29971a45a9c57a6a9875701698a5`
Applications: API, Indexer |
| `TOKEN_BRIDGE_CONTRACT` | Token bridge proxy contract. For \`TokenBridge\` supply module. | Version: v1.3.2+
Default: `0x7301CFA0e1756B71869E93d4e4Dca5c7d0eb0AA6`
Applications: API, Indexer |
## CDN
This feature was implemented in [#10675](https://github.com/blockscout/blockscout/pull/10675)
| Variable | Description | Parameters |
| --------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------- |
| `NFT_MEDIA_HANDLER_AWS_ACCESS_KEY_ID` | S3 API Access Key ID | Version: v6.10.0+
Default: (empty)
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_AWS_SECRET_ACCESS_KEY` | S3 API Secret Access Key | Version: v6.10.0+
Default: (empty)
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_AWS_BUCKET_HOST` | S3 API URL | Version: v6.10.0+
Default: (empty)
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_AWS_BUCKET_NAME` | S3 bucket name | Version: v6.10.0+
Default: (empty)
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_AWS_PUBLIC_BUCKET_URL` | Public S3 bucket URL | Version: v6.10.0+
Default: (empty)
Applications: API |
| `NFT_MEDIA_HANDLER_ENABLED` | if `true`, CDN feature enabled | Version: v6.10.0+
Default: `false`
Applications: Indexer, NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_REMOTE_DISPATCHER_NODE_MODE_ENABLED` | if `true`, nft media handler is supposed to run separately. | Version: v6.10.0+
Default: `false`
Applications: Indexer, NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_IS_WORKER` | if `true`, and `NFT_MEDIA_HANDLER_REMOTE_DISPATCHER_NODE_MODE_ENABLED=true` will be started only nft\_media\_handler app | Version: v6.10.0+
Default: `false`
Applications: Indexer, NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_WORKER_CONCURRENCY` | Concurrency of media handling (resizing/uploading) | Version: v6.10.0+
Default: `10`
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_WORKER_BATCH_SIZE` | Number of url processed by one async task | Version: v6.10.0+
Default: `10`
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_WORKER_SPAWN_TASKS_TIMEOUT` | Timeout before spawn new task | Version: v6.10.0+
Default: `100ms`
Applications: NFT\_MEDIA\_HANDLER |
| `NFT_MEDIA_HANDLER_BACKFILL_ENABLED` | If `true`, unprocessed token instances from DB are processed via nft\_media\_handler | Version: v6.10.0+
Default: `false`
Applications: Indexer |
| `NFT_MEDIA_HANDLER_BACKFILL_QUEUE_SIZE` | Max size of backfill queue | Version: v6.10.0+
Default: `1000`
Applications: Indexer |
| `NFT_MEDIA_HANDLER_BACKFILL_ENQUEUE_BUSY_WAITING_TIMEOUT` | Timeout before new attempt to append item to backfill queue if it's full | Version: v6.10.0+
Default: `1s`
Applications: Indexer |
| `NFT_MEDIA_HANDLER_CACHE_UNIQUENESS_MAX_SIZE` | Max size of cache, where stored already uploaded token instances media | Version: v6.10.0+
Default: `100_000`
Applications: Indexer |
| `NFT_MEDIA_HANDLER_BUCKET_FOLDER` | Folder in R2/S3 bucket, where media files are stored | Version: v9.2.0+
Default: (empty)
Applications: Indexer |
## Addresses Blacklist management
Section created as a result of [#11417](https://github.com/blockscout/blockscout/pull/11417)
| Variable | Description | Parameters |
| ------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
| `ADDRESSES_BLACKLIST` | A comma-separated list of addresses to enable restricted access to them. | Version: v6.10.0+
Default: (empty)
Applications: API |
| `ADDRESSES_BLACKLIST_KEY` | A key to access blacklisted addresses (either by `ADDRESSES_BLACKLIST` or by blacklist provider). Can be passed via query param to the page's URL: `?key=...` | Version: v6.10.0+
Default: (empty)
Applications: API |
| `ADDRESSES_BLACKLIST_PROVIDER` | Blacklist provider type, available options: `blockaid` | Version: v6.10.0+
Default: `blockaid`
Applications: API |
| `ADDRESSES_BLACKLIST_URL` | URL to fetch blacklist from | Version: v6.10.0+
Default: (empty)
Applications: API |
| `ADDRESSES_BLACKLIST_UPDATE_INTERVAL` | Interval between scheduled updates of blacklist | Version: v6.10.0+
Default: `15m`
Applications: API |
| `ADDRESSES_BLACKLIST_RETRY_INTERVAL` | Time to wait before new attempt of blacklist fetching, after abnormal termination of fetching task | Version: v6.10.0+
Default: `5s`
Applications: API |
## Prometheus Metrics Management
| Variable | Description | Parameters |
| ------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- |
| `PUBLIC_METRICS_ENABLED` | Enables the `/public-metrics` endpoint. Implemented in [#10469](https://github.com/blockscout/blockscout/pull/10469). | Version: v6.8.0+
Default: `false`
Applications: API |
| `PUBLIC_METRICS_UPDATE_PERIOD_HOURS` | Update frequency (in hours) for refreshing data at the `/public-metrics` endpoint. Implemented in [#10469](https://github.com/blockscout/blockscout/pull/10469). | Version: v6.8.0+
Default: 24
Applications: API |
| `INDEXER_METRICS_ENABLED` | Flag to enable base indexer metrics. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: true
Applications: Indexer |
| `INDEXER_METRICS_ENABLED_TOKEN_INSTANCES_NOT_UPLOADED_TO_CDN_COUNT` | Flag to enable indexer metric: the count of token instances not uploaded to CDN. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: false
Applications: Indexer |
| `INDEXER_METRICS_ENABLED_FAILED_TOKEN_INSTANCES_METADATA_COUNT` | Flag to enable indexer metric: the count of token instances with failed metadata fetches. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: true
Applications: Indexer |
| `INDEXER_METRICS_ENABLED_UNFETCHED_TOKEN_INSTANCES_COUNT` | Flag to enable indexer metric: the count of token instances pending to fetch. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: true
Applications: Indexer |
| `INDEXER_METRICS_ENABLED_MISSING_CURRENT_TOKEN_BALANCES_COUNT` | Flag to enable indexer metric: the count of current token balances with missing values. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: true
Applications: Indexer |
| `INDEXER_METRICS_ENABLED_MISSING_ARCHIVAL_TOKEN_BALANCES_COUNT` | Flag to enable indexer metric: the count of archival token balances with missing values. Implemented in [#13539](https://github.com/blockscout/blockscout/pull/13539). | Version: v9.3.0+
Default: true
Applications: Indexer |
## Old UI Management
| Variable | Description | Parameters |
| ----------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- |
| `NETWORK` | Environment variable for the main EVM network such as Ethereum or POA. | Version: All
Default: `POA`
Applications: API |
| `SUBNETWORK` | Environment variable for the subnetwork such as Core or Sokol Network. This will be displayed as selected in the chains list dropdown. | Version: All
Default: `POA Sokol`
Applications: API |
| `JSON_RPC` | JSON RPC endpoint of the chain for the WalletConnect integration. Implemented in [#4931](https://github.com/blockscout/blockscout/pull/4931) | Version: v4.1.0+
Default: (empty)
Applications: API, Indexer |
| `SHOW_MAINTENANCE_ALERT` | Disables/enables announcement at the top of the explorer. | Version: v3.6.0+
Default: `false`
Applications: API |
| `MAINTENANCE_ALERT_MESSAGE` | Message text of the announcement at the top of the explorer. | Version: v3.6.0+
Default: (empty)
Applications: API |
| `SHOW_ADDRESS_MARKETCAP_PERCENTAGE` | Configures market cap percentage column on the top accounts page. | Version: v2.1.1+
Default: `true`
Applications: API |
| `HIDE_BLOCK_MINER` | Hides miner/validator/sequencer on block page and tiles if the value is `true`. Implemented in [#4611](https://github.com/blockscout/blockscout/pull/4611) | Version: v4.0.0+
Default: (empty)
Applications: API |
| `DISPLAY_TOKEN_ICONS` | Displays token icons from Trust Wallet assets repository if `true`. Implemented in [#4596](https://github.com/blockscout/blockscout/pull/4596) | Version: v4.0.0+
Default: (empty)
Applications: API |
| `DISABLE_ADD_TO_MM_BUTTON` | If `true`, "Add chain to MM" button doesn't appear. Implemented in [#6843](https://github.com/blockscout/blockscout/pull/6843)" | Version: v5.1.0+
Default: (empty)
Applications: API |
| `PERMANENT_DARK_MODE_ENABLED` | If `true`, permanent dark mode is enabled. Dark mode switcher is hidden in this case. Implemented in [#6763](https://github.com/blockscout/blockscout/pull/6763) | Version: v5.1.0+
Default: (empty)
Applications: API |
| `PERMANENT_LIGHT_MODE_ENABLED` | If `true`, permanent light mode is enabled. Dark mode switcher is hidden. Implemented in [#6838](https://github.com/blockscout/blockscout/pull/6838) | Version: v5.1.0+
Default: (empty)
Applications: API |
| `ADMIN_PANEL_ENABLED` | if `true` admin/\* routes are available. Implemented in [#5208](https://github.com/blockscout/blockscout/pull/5208). **NOTE: Only Available for Hosted Clients.** | Needs Recompile: ☑️ Version: v4.1.2+
Default: (empty)
Applications: API |
## Header and Footer
### Header
| Variable | Description | Parameters |
| -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `LOGO` | Environment variable for the header logo image location. The logo files names for different chains can be found [here](https://github.com/poanetwork/blockscout/tree/master/apps/block_scout_web/assets/static/images). | Version: all
Default: `/images/blockscout_logo.svg`
Applications: API |
| `SHOW_TESTNET_LABEL` | Enables testnet label right after logo in the navigation panel. Implemented in [#5732](https://github.com/blockscout/blockscout/pull/5732) | Version: v4.1.6+
Default: (empty)
Applications: API |
| `TESTNET_LABEL_TEXT` | The text inside the test label. Implemented in [#5732](https://github.com/blockscout/blockscout/pull/5732) | Version: v4.1.6+
Default: `Testnet`
Applications: API |
| `SUPPORTED_CHAINS` | An array of supported chains displayed in the chains dropdown. This var was introduced in this PR [#1900](https://github.com/poanetwork/blockscout/pull/1900) and looks like an array of JSON objects. | Version: v2.0.0+
Default: `[ { title: "POA", url: "https://blockscout.com/poa/core" }, { title: "Sokol", url: "https://blockscout.com/poa/sokol", test_net?: true }, { title: "Gnosis Chain", url: "https://gnosis.blockscout.com/" }, { title: "Ethereum Classic", url: "https://etc.blockscout.com", other?: true }, { title: "RSK", url: "https://rootstock.blockscout.com", other?: true } ]`
Applications: API |
| `APPS_MENU` | true/false. If true, the Apps navigation menu item appears. | Version: v3.3.1+
Default: `false`
Applications: API |
| `APPS` | An array of embedded/external apps to display in Apps menu item. This var was introduced in this PR [#3184](https://github.com/poanetwork/blockscout/pull/3184) and looks like an array of JSON objects. An example of an embedded link is described here [#](https://github.com/blockscout/blockscout/pull/6397) | Version: v5.0.0+
Default: (empty)
Applications: API |
### Footer
| Variable | Description | Parameters |
| -------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
| `FOOTER_LOGO` | Environment variable for the footer logo image location. The logo files names for different chains can be found [here](https://github.com/poanetwork/blockscout/tree/master/apps/block_scout_web/assets/static/images). | Version: all
Default: `/images/blockscout_logo.svg`
Applications: API |
| `RELEASE_LINK` | The link to Blockscout release notes in the footer. | Version: v1.3.5+
Default: `https: //github.com/poanetwork/ blockscout/releases/ tag/${BLOCKSCOUT_VERSION}`
Applications: API |
| `BLOCKSCOUT_VERSION` | Added to the footer to signify the current BlockScout version. | Version: v1.3.4+
Default: (empty)
Applications: API |
| `FOOTER_CHAT_LINK` | Link to Chat menu item in the footer. Implemented in [#5719](https://github.com/blockscout/blockscout/pull/5719). | Version: v4.1.6+
Default: `https://discord.gg/3CtNAqVMRV`
Applications: API |
| `FOOTER_FORUM_LINK_ENABLED` | Enable forum menu item in the footer. | Version: v5.1.3+
Default: `false`
Applications: API |
| `FOOTER_FORUM_LINK` | Link in Forum menu item in the footer. Implemented in [#5719](https://github.com/blockscout/blockscout/pull/5719) | Version: v4.1.6+
Default: `https://forum.poa.network/c/blockscout`
Applications: API |
| `FOOTER_TELEGRAM_LINK_ENABLED` | Enable Telegram menu item in the footer. Implemented in [#7345](https://github.com/blockscout/blockscout/pull/7345). | Version: v5.1.4+
Default: `false`
Applications: API |
| `FOOTER_TELEGRAM_LINK` | Link in Telegram menu item in the footer. Implemented in [#7345](https://github.com/blockscout/blockscout/pull/7345). | Version: v5.1.4+
Default: (empty)
Applications: API |
| `FOOTER_GITHUB_LINK` | Github repository. Implemented in [#5719](https://github.com/blockscout/blockscout/pull/5719). | Version: v4.1.6+
Default: `https://github.com/blockscout/blockscout`
Applications: API |
| `FOOTER_LINK_TO_OTHER_EXPLORERS` | true/false. If true, links to other explorers are added in the footer. | Version: v5.1.3+
Default: (empty)
Applications: API |
| `FOOTER_OTHER_EXPLORERS` | The list of alternative explorers. | |
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